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The lava tube is at a constant 42°F or 6°C...so dress accordingly. Bring at least 2 light source. If you are soloing, I suggest a headlamp as your primary... you might need your hands free. Please make sure your children know not to shine their light at oncoming hikers. The floor is uneven and you will need to scramble over some larger rocks. Sturdy shoes are recommended. The entrance is awe inspiring. Especially when look up and out the way you came in with lighting. When you reach the bottom of the metal stairs it will almost be total darkness. You have 2 paths select from.... under the stairs takes you 1.5 miles one way (I did not take that route) the other route is .75 miles one way. I an not going to dishonor the amazing trek but trying to describe what you will see. But it's pretty cool. I attached some pictures.

First things first, there are 2 ways to go. An easy way and an extremely hard way. People, pay attention. Cell phone flashlights will NOT work for the "difficult walking" way, nor the easy way, unless you like to trip. As for the "difficult walking" way, expect scrambling 10-25 foot high rock falls. Oh in pitch black unless you have a good headlamp, don't attempt to do it with a Gas lamp, yeah don't be that idiot, or cell phone lights, or cheap dollar store led flashlights. Oh and don't eat food, vape, or think your inshape to do the "difficult walking" there is a good 8 foot pull yourself up a rope section that's not easy in the bit. Oh and take your time, no rush but do be mindful of others going through cause your not being in shape or misunderstanding what kind of "hike" this is going to be ain't other people's faults. This is a truly amazing experience if you are ready, but please just stick to the easy out and back end not the 1 way 1.75 mile over massive rock falls, and technically climbing if you are not ready.

What a unique experience! This was a surprisingly difficult and treacherous adventure. Luckily we were well equipped with warm gloves and diver flashlights. I HIGHLY recommend a hands-free light source. Divers lights with wrist straps are ideal. The group ahead of us was struggling and I had an extra flashlight I let them borrow which helped them out. Get ready for crawling and jumping and squeezing!

Soooo much fun! We'd wanted to visit since we'd moved to the PNW, finnnnally got there last weekend. We got tickets for the first time frame, 9am, and by the amount of cars there with us at that time we assumed we'd be touring in one big line. But thankfully we were pleasantly surprised, as we were only occasionally near any other people while inside. We wanted to do the upper and lower, so we decided to go with the more challenging upper first. Wise choice...granted we are middle aged, but the upper was a good workout!! Wayyyy more bouldering and crawling around on all fours than I had assumed. DEFINITELY bring your gloves, in my opinion they were essential. And I'd recommend shoes with ankle support as being of way more importance than waterproof shoes. I had on waterproof low-tops, and while they were barely damp on the toes my ankles were spent! And for my fellow shorties out there, I wouldn't have made it by myself. Granted, I don't have the greatest grip strength or arm muscles, but my hubby had to boost me 2 times...2 spots I don't think I would've been able to traverse without use of his butt push and his thigh step. After you emerge through the teensie exit hole from the upper tube it's a mile walk back through the pretty forest to the entrance to start the lower tube. Sweaty and fairly exhausted, yet oddly energized from the adventure, we re-entered and began the lower tube. It's a simple, dark, down and back walk compared to the upper. With many more people able and willing to walk the lower, the experience is quite different in that you're really never alone or in complete darkness here. No real work in the lower, it's good for anyone...although like the upper you still must watch your step at all times. For us, after completing the upper first, the lower actually seemed boring! We finished it though...and don't get me wrong, by itself the lower would be a VERY fun adventure...it just felt desperately mild right after completing the much more involved upper. If you're going for the upper, bring gloves, long pants (my knees are bruised up) and 2 light sources...if you lose your light you'll definitely be waiting to piggyback a fellow spelunker in order to get out. In either tube you need good shoes and light sources. Just a fabulous good time...I highly recommend!!

Two words: GO HERE. I've done a lot of hiking in Washington and this is by far one of the coolest spots I've ever been to. It was definitely a workout but worth the journey! My group opted for the upper caves and were equipped with headlamps. If possible, get some! Scrambling over rocks for 1.5 hours would have much more arduous if we didn't have both of our hands free. The lower caves would probably be fine with just a flashlight, however.

Remember when Mt. St. Helen erupted in 1980? I was 1,050 miles to the south and we were covered in its ash for days. Now I live in a place where I can see the flat cone of the volcano on clear days, and the thought of standing in my yard and watching it erupt makes me shudder. Were you here? What was that like? Volcanos have always fascinated me, having grown up along the Pacific rim. The opportunity to explore a lava tube, the longest one in the continental U.S., is just to enticing to pass up. Summary: don't miss this opportunity. There are two lava tube trails, a short manageable one good for small kids and folks who can't climb and scramble, and a much longer, harder one that will challenge your up and over skills. They limit the number of people and you'll need to go online and get a $2 ticket for your car. Load as many people as you want in it, the ticket is for the vehicle. They check and they can't be sweet talked if you pull up without a ticket, so just do it. You also need either the nw forest pass or the Washington discover pass. You can get those at various retailers, on line, even at a gas station down the road from the park. Please also take precautions to protect the bats who live in the caves. There is a fungus in the U.S. that is spreading to bat populations. We can stop it by making sure our shoes and boots are clean. I scrubbed my boot soles with soap and water, and washed my gloves at home. Then I didn't put them on until I got there. You don't have to do all that, but if everyone did it would help. There are boot scraping stations where you can scrape off schmootz before descending. Okay. The lava tubes. I'm really surprised they don't have to rescue people every other day. It was not an easy walk. We took the longer, harder route. We had headlamps and back up flashlights, as well as spare batteries. A couple of times we turned off our lights and stood in the dripping pitch black. My eyes desperately tried to find anything, and it reminded me of a camera lenses that clicks back and forth when it can't find the focus. The other people got on my nerves. Kids, the chattering monkey sound is funny *once*. And there was a couple that simply would not stop talking. We were able to let them pass and get some space between us. It was good to be able to hear the water dripping, and the wind moving through. It's mostly clean, but the graffiti and discarded trash made me sad. People really suck. We had to scale several places where the rock wall was taller than we are. The surface of the tube is grooved and uneven, and throughout there are piles of stones and boulders that have to be carefully passed. Several times I had to hunch over and get through narrow passages. No guide ropes, no marked paths, you just keep going and find your way. It was great!! 2.5 miles later we emerged through a small opening a mile and a half from the visitor center. We sat up at the top and watch other people emerge. Smiles all around, pleased at having done the entire tube. The trail back down was typically gorgeous Pacific northwest rain forest. This was a great time and I'll probably go again. Remember your lights!

The trails are not very well marked. As you go down into the metal stairs you can go straight into the lower section which is almost the same look the whole way through until the end it gets smaller and then you can't go anymore. It you go behind the stairs that is where you can get to the upper caves where there are obstacles to climb over and around and then at the very end you exit the cave and hike back on the dirt trail. They need signs explaining this. Everyone at the beginning had no idea where to go. A good 600+lumens headlamp is good and around a 1500 lumens one would be ideal.

Very fun hike! Definitely chilly inside the cave but once you're moving you'll get hot. I recommended a headlamp and possibly gloves since I was using my hands quite a bit making sure I didn't slip while climbing on the rocks. There is one spot that was very tough to get up, I needed some help (a rope used to be there but know it's gone). The trail afterwards was very pretty too. Overall a very fun hike!

Mt. St. Helen's National Park isn't only about the volcano, though that is way cool too. Ape Cave is a lava tube located about a 2 hour drive away from the volcano observatory. Driving time-wise, its actually close to Vancouver, WA, then the volcano. There are nominal national park fees to visit (or use an annual pass), but the trip is worthwhile. Ape cave is the 3rd longest lava tube in North America. We walked the shorter lower cave which was just shy of 1 mile long. The upper cave, which we did not explore, is longer and more strenuous, requiring clambering over rocks. Both caves are pitch black with rough floors so flashlights (and a spare), and preferably hiking boots are a must. As the cave stays a comfortable 45 to 50 degrees, dress accordingly. There is a parking lot near the cave trailhead that could contain roughly 80 cars. During summer weekends, parking could be limited and the cave and trails could be busy (not an ideal nature experience). We went during a weekday so we experienced the tranquillity of nature and the undeveloped cave. The surface trail from the cave entrance north towards Mt. St. Helen's offered a beautiful view of the mountain and some lava flows; don't miss this walk. While this cave is not spectacular with stalagmites, etc., (e.g., Mammoth Cave), it is a unique site to see.

Please support our beautiful natural resources! The Ape caves were exciting and worth the windy drive to Cougar. If it's a hot day, just mozy on down here to 46 degF temperatures underground and learn about how the lava tubes were created. Shine a flashlight on the most eerie caverns in southern Washington. Cheap date, too!

SO. MUCH. FUN. I have been wanting to check out the Ape Caves for such a long time and I'm glad that we finally had the opportunity to do so! First things first: right now, you can only visit by reservation which costs $2 and can be taken care of at recreation.gov. If you are planning a trip, book early because those spots can go fast, especially on popular weekends. The reservation system is nice because it doesn't get too crowded. I can't imagine how bad parking must have been before that. On to the fun! We explored the lower cave on this visit, and it was pretty cool. We heard there were bats in the caves so we were half hopeful and terrified that we could come across them, but I guess they stay in the upper cave because we didn't see a single bat. The cave is cool, temperature wise, so make sure that you bring a sweatshirt or similar to keep you warm. Hiking boots are a plus as the floor is rough in spots and you will want that ankle support. We brought headlamps which were great for lighting the pathway. Definitely bring a light source because it is, as one would expect, totally dark down there. If you forget to bring one you can rent one at the little store in the parking lot. Your cell phone will NOT provide enough light, so don't rely on that. We did not explore the upper cave. We had heard about having to scale an 8-foot wall and crawl through bat guano and that pretty much put paid on that for us. The people that did go up top seemed to enjoy it and think it was good fun.
10 years ago
Ape Cave is a lava tube located in Gifford Pinchot National Forest just to the south of Mount St. Helens in Washington state. Its passageway is the longest continuous lava tube in the continental United States and the third longest lava tube in North America at 2.5 miles. Bring 2 flashlights one to use and a spare just in case . I guarantee you wont be able to see a thing if you have a flashlight malfunction lol! This is exspecially a great place to visit on a hot day because the temps stay cool in the tubes so dress warm even if its a hot day. This is a great hiking experience where you can crawl over boulders and explore the caves. The floor can be uneven in places so be careful I found myself laying on the cave floor once while I was there. . . i lost my balance and somehow took tumble that was unplanned not painful and made us giggle. Mike said " what you doing down there?' lol This was a really fun trip everyone should add it to there bucket list forsure! read more
15 years ago
This is a great hike, that is adventurous and challenging. But you must be prepared. There are two routes - the lower and the upper cave. Do NOT attempt the upper cave unless you are seriously prepared and have about 3 hours. The lower cave is easy and takes about an hour to an hour and a half. However, it dead ends and you turn back. We did this and thought hey lets try the upper cave because it allows you to exit out the other side. The sign in the cave said it was a 1/2 mile hike, but someone scratched off the one (1) in front of the half. The sign also says "difficult walking." It should read insane walking, that is not really walking but climbing over huge boulders. There is only one sign at the beginning and you have no real direction. After the first mound of rocks go to the right, do not go left (it dead ends). Later You need to scale an 8 foot sheer rock wall that if not for running into two marines by chance I would not have made it. Then as you think it has to end soon you see daylight! But its just a tease. There is a natural skylight that there is no way you can climb out of. People have been seriously injured trying to climb up and out, so dont think that is the way out. The real exit, thankfully, has a ladder, and is just a bit past that skylight. Once you are out you have an easy mile and half back on a nice easy trail to get to the main park entrance. Overall, this was a blast and I will do it again now that I know what to expect. Make sure you have a head lamp, much better than a flashlight. Make sure your batteries wont die. It is pitch black, and you are on your own. There is no staff or ranger rick to help you if you find yourself in need of assistance. Bring water in your back pack and some energy bars. Wear appropriate clothing (no shorts), and its about 42 degrees down there. These caves and the rest of Mount St. Helens is fantastic to explore. read more
9 years ago
So much fun! Just bring your gloves, hiking footwear and head light, and you'll be set. We did both upper and lower and it was a great experience. read more
14 years ago
This is one of my favorite things to do in the Pacific NW, especially on a hot day out this is a perfect thing to do. Did this the other day when it was about 100 degrees. Its a constant 42 ish degrees in the caves. The hard lava tube is really alot of fun...be prepared for lots of rock scrambling, you must pay attention or you will end up with lots of scrapes and bruises. There is one 8 foot rock wall that you have to climb up which is somewhat of a challenge. The 1st time I did it there was no rope to hang on to, the latest time somebody had tied a rope around a rock on top of the 8 foot wall to assist you getting to the top. Other than that there are like 25 or so large boulder fields you will have to climb to get to the other end. I would reccomend a headlamp as opposed to a flashlight or lantern as you will for sure be using your hands quite a bit maneuvering around the large boulders. We did the easy lava tube after the hard one and it felt kind of lame in comparison, there are really no boulder piles to climb over just a tunnel you walk down, at the end it ends up getting pretty narrow to a point where you have to get down on your belly, at that point I turned around. This is a really fun thing to do especially on a hot summer day, highly reccomended. read more
13 years ago
I have gone multiple times and it has been great each time. Ape Cave is pretty cold so I recommend bringing a jacket. There are two routes through, the short one and longer one. I take the longer one usually. It is very interesting to see plants growing below larger holes in the walls. Some climbing is required but all but one spot is easy. One spot has hand foot holes but is direct climb up for about seven feet. The small trail dead-ends and the longer trail ends with a ladder up to forest floor. Then you follow a trail that is also marked by flags on trees back to the parking lot. Altogether a fun trail. read more
13 years ago
We went in March and the road was closed off. We had driven almosy 2 hrs to get there so that didn't deter our young family from making the 3/4 mile easy hike through the snow to reach the caves. Our youngest hiker, 3 yrs old, made it there, through the lower cave, and back to the car. (Though his feet got cold and wet. Boots would have been better for him.) overall it was a great adventure for us all. Even the 5month old did fine in the baby bjorn. just one slippery part getting into the cave, but there are railings and ropes to hold onto.Our 10yr old cant wait to return to explore the upper cave with dad on a later date. One drawback was we ended up having to pay $22 for a sno-park pass instead of the $5 we were expecting to pay. We bought it at a little rv resort about 6 miles before you get to the caves. read more
12 years ago
Great cave system. I took 5 ten year olds hiking up the long tunnel and they came out with smiles and loads of stories about the cave, lava fall, areas of water, blow outs, stalagmites, and rock piles. Fare warning you may find the trail etiquette of others a little nasty (one fellow had his phone playing music, couple smokers filled the caves with cigarette smoke) but over all folks seem to gel in the cave. it can be more wet and "rainy" in the cave than outside the cave if it has rained recently so take a rain jacket. gloves are super useful but not totally needed. some use lanterns we all had headlamps and didn't miss the lantern. Some sections had a foot of water on the floor so be prepared for a little wet in the boots if not water proof (can get by on the sides mostly). Caves are cool as in the temp is lower than outside so be ready for that and DO IT! read more
15 years ago
Ape Caves at Mt. St. Helen's There are many things you want to do when you visit Washington State. One is to visit this magnificent Mountain. Mt. St. He lens has so many different things to offer, from hiking the mountain, fishing in Spirit Lake to walking through the Ape Caves. One of the things I love doing when I am up In Washington besides looking at this gorgeous Mountain is to walk in the Ape Caves. There is a $ 5.00 park fee for the whole day. There are some things you will need before walking the Ape Caves. You will need to make sure you have a good sturdy pair of tennis shoes or hiking boots. Next make sure you have a good working flash light, because it is dark in the caves. Last and most important you need to make sure you have on warm clothes. According to the 1990 Road Guide to Volcanic Deposits of Mt St He lens the lower Ape Cave is .75 mile long. Depending on how fast or slow of a walker you are you can walk the cave round trip in about an hour. You will come across many different kinds of people. You may see older people just wanting to get out to the youngest with their family. For some people the Ape Cave is too small and crowed with people. So if you do not like crowds and small places but want to walk along the Ape Caves you can do so along the upper trail. While you are walking from the parking lot, which is big enough to hold RVs, this is what we brought. You will see green; nothing but big beautiful green trees. You will see many things once again growing from new trees to many different kinds of flowers. You might even get to see a squirrel or two. Once you are walking in the caves you will see where lava has ate away and left the trail. Do not take anything out of the Caves because you do not know if it is a food sources for some insect that can only now survive in the Ape Cave. One last thing you might want to bring with you on your trip to the Ape Caves is a camera. Make sure it has a good working flash because it is dark in the caves. You will want pictures to remember the beautiful time you had while you were there, especially if you do not get to go back as often as you would like to. All in all I would take my family and friends to the Ape Caves. It is one experience they will never forget. You not only get to see a beautiful mountain but you get to see what the mountains lava has also done. read more
10 years ago
Awesome caves and something to truly experience! We did the lower cave first. It is a slight grade and perfect for the family, young and old. You just bring flashlights, but i recommend one for each person. My 10 & 15 year old were so excited on the way back they talked my wife & I into the upper cave. It is an entirely different beast! Come prepared, Dress in layers, take your time, and bring a headlamp, as you need your hands free to balance yourself. It is about 2 1/2 miles long and can be very unsafe due to multiple rock piles and large walls. We saw a few families on the upper cave with young children, that slowed down everyone. I would not recommend the upper cave for kids younger than 10. Saw lots of irresponsible parents letting their kids, ages 3-7, walk way ahead of them with no lights on large rock piles. Also saw many kids fall on the rocks. You could easily break an ankle or worse, so pay attention and be a responsible parent. No one tells you, but there a multiple large rock piles to climb over and on, some 30-40 yards long and 20 ft high. Along with the piles, you will need to contend with the walls. Not one 8ft wall as most people talk about, but multiple walls ranging from 6-8ft. Lots of people start the upper caves from the exit, causing huge bottlenecks in the caves because they think going down is easier than up. Remember though, it is a mile and a half trail walk to the exit or from the exit back to the car. Weekends are slammed and park rangers are out in force ticketing away. read more
More info about Ape Cave
Cougar, WA 98616
Directions
(360) 449-7800
Call Now
Visit Website
https://www.fs.usda.gov/recarea/giffordpinchot/recarea/?recid=40393
Hours
What time does Ape Cave open?
Ape Cave opens at 5:00 AM on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
What time does Ape Cave close?
Ape Cave closes at 9:00 PM on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
Mon-Sun 5:00 AM - 9:00 PM
Indoor Amenities
Does Ape Cave allow dogs?
No, Ape Cave does not allow dogs.
Outdoor Amenities
Does Ape Cave have bike parking?
Yes, Ape Cave has bike parking.
Does Ape Cave have parking?
Yes, Ape Cave has parking options. Private Lot Parking
Ask the Community - Ape Cave
Are the lower caves ok for kids around age 6?
It is totally fine with 6 year old since it's almost flat in the lower cave.
Review Highlights - Ape Cave
“The cave is cool, temperature wise, so make sure that you bring a sweatshirt or similar to keep you warm.”
Mentioned in 14 reviews
Why does Yelp recommend reviews?
2 reviews that are not currently recommended
The reviews below are not factored into the business's overall star rating.
15 years ago
Effin' awesome. One of, if not the best, SIMPLE mainstream- public- type -folk, cave experiences in the WORLD! Variety of all kinds, simple, fun, just a great experience for first timers, and still fun for the experienced. There are cooler and longer or deeper or prettier blah blah blah but none have so much to offer in one chill little place just down the road a ways. !!!!!!!!!!!!!!!!!!!!!!!!!!BUT REMEMBER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! APE (CAVE) = SASQUATCH (CAVE) = BIGFOOT (CAVE) Natives tell it, as well known fact, that hundreds of years ago the cave area was the communal roost for Sasquatch family groups living in or passing through the area. Before St H blew, there were still regular area sightings, more than anywhere else in the state, every year. Some say they use the hole at the end of the lower tunnel to access a vast underground network of lava tube highways. Staying hidden from modern man more and more as years pass. So watch out! I never seen anything at all but my MOM (not into weird ANYTHING, and TOTALLY unaware of cave legend at the time) said as we drove home Aug 24 2004, "...I was surprised that dog didnt have ANY problems keeping up, running loose. A few times he was closer to us than to them." The couple had entered as we were parking, but we saw them up ahead when we entered. He was adjusting a light and she played with a small dog. I watched her pick up the dog and put it in her coat front and they sped off. I saw after in the parking lot that it was a cat, as I passed their car. I barely noticed, but did, as it was a cat, odd. Mom said no way a cat; she watched a shadowed "thing" numerous times drifting about in the dark behind them the entire day. read more
7 years ago
Loved exploring Ape Cave with my family. The bat guy was very informative and it was fun learning about how the cave was formed. If you have trouble with your balance or walking on uneven surfaces than you should probably hang back. read more
Ape Cave - hiking - Updated May 2026
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