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Gregory Canyon

4.8 (6 reviews)

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turn left at the hairpin right after baseline becomes flagstaff
Paul W.

Marvelous trailhead with access to miles and miles of steep trails. You can probably access all of Boulder Mountain Park from this trailhead, and it's only about a mile from CU. Take Baseline west until the hairpin right turn where the road turns into Flagstaff; turn left instead to enter the short (~.25 mile) fee-enforced paved parking area. The trailhead area has bathrooms and a gate that closes at sundown. There's also free parking (in gravel pullouts) and access to other trails less than a quarter mile from the fee area. It's a pretty well-maintained (but not overly manicured) trailhead. The trails themselves are much more serious and technical. Nothing too extreme that you'd need a rope (unless you want to go off-trail and make it that way), and you don't have to traverse any precipitous cliffs, but it would be pretty impossible to bike these singletrack trails unless you're a magic goat. I could only run about three quarters going up; most of the trail is like a rock staircase. Trails are definitely well-maintained (wooden steps here and there in good condition). The knife-edge peaks are probably a lot of fun for a serious boulderer. I took Saddle Rock trail all the way to Green Mountain Peek (~2300 ft climb). About 1.3 miles up (~1200ft climb), Saddle Rock meets Amphitheater. If you're up for a quick (~30ft) rock climb, you go up a large pile of boulders to get a panoramic view over the countryside east of the Flatirons. Continue up to Green Mountain summit to conquer the jagged Flatiron ridgeline and get the full 360 degree panorama. You can peer down into Kossler lake and even see some snowy peaks along the western horizon. Turn around and you can see Denver, and (perhaps with enough beer) even Kansas.

Good view from the trail

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4 years ago

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Chautauqua Park - More excavators

Chautauqua Park

(348 reviews)

Things are changing here after 100 years. Chautauqua Auditorium is being renovated and winterized…read more It had been needed before this as another concert venue in Boulder would have been appreciated sooner but once Boulder won Sundance it became a necessity. But when you come in the summer it will still look the same. A removable heated tent will be erected inside and heated by geothermal heat from underneath that will be transferred underground from the dining hall kitchen's surplus stored energy. So modern in such an old structure. So when you visit this spring there is a lot of truck traffic and digging and detours around the building but you can see from the last picture, the green and the view of the Flatirons are undisturbed.

Overall, it was a refreshing late October hike on the Flatiron Loop trail! Since we were first time…read morevisitors, we asked for a trail recommendation at the ranger station that fit in with our plans, so something in the 2-hr range. They suggested going in a counterclockwise direction which got the elevation gain done sooner and would finish with a more gradual descent. Being a sea-level creature, I did have to catch my breath a few times on the way up. Now, at the uppermost part of the loop after a bunch of stone steps, there were some all-rock areas where hunching down with a hand or two on the rock helped with balance. Afterward we noted signs on the trail allowing horses. They must have goat like abilities for those rocky parts, I thought. If you like seeing people, there were plenty during the early afternoon hours, sometimes making passing on narrow trail sections a little tricky. We got lucky with parking, going around the large grassy area only once. On the way out, we thanked the ranger for the great recommendation, gave up our parking spot to the next lucky person and went on our way, with plenty of time for our next activity.

Lion's Lair Trail - Views at the end of spring.june 14, 2016

Lion's Lair Trail

(5 reviews)

Great trail. Nice views. A little over 4 miles with a manageable, gradual incline. I'd say it's…read moremoderate but not particularly challenging. Saw a lot of people running. The trail is well-maintained and marked. The trailhead sign isn't readily apparent from the road so we had to pull over and check that it was the right one. The GPS did have the trailhead as slightly further down the road but we ended up in the right place. There's parking along the road, FYI. The trail will take you to the top of Mount Sanitas. Take a look at the map I posted -- there are multiple trails that take you to the peak.

Beautiful hiking trail just outside of Boulder. I freaking love this trail. I was in Denver and…read moreBoulder for a conference & to see friends. This was one of the short hikes I was hoping to squeeze into my busy day so that I could get that amazing mountain view that I don't get to see in the city. The trail itself is not too steep, and offers beautiful views all around, no matter where you are on the trail. When you are navigating to the trail, you will be driving uphill, and lose cell signal as you approach the base. There isn't really any signal on the trail in general. Parking is all roadside parking at the curved bend of a road. There are clearly areas to park for hikers. This trail when I was hiking was populated by locals either hiking solo or in a small group. Would definitely recommend for a couple hour hike. Only took me about 2 hours.

Settlers Park - Junction of longer trails

Settlers Park

(3 reviews)

Now named "The People's Crossing" to emphasize the variety of founders, both indigenous and…read moreEuropean, this is a fine park situated across Boulder Creek from Eben G Fine. You can also connect to many trails north, west, and south! A true crossing of people. With massive Red Rocks and lots of nature, you can do a great amount of exploring here. There's two lots for parking, one off Canyon, or you park on Arapahoe and walk over. Most folks enjoy doing the rocky scrambles near the beautiful sandstone outcrops. They are similar to Garden of the Gods or Red Rocks Amphitheater! Several trails wind around the rocks allowing for plenty of views. You can even find an old foundation on a cliff! If you want to make an adventure out of it, try heading up Anemone Loop for a beautiful forest jaunt! It took me around 2 hours at a moderate pace with plenty of options for exploring.

This is an easy yet nerve-wracking hike. Sections of the trail are slick, so the entire time you…read moreare climbing up you're kinda concerned "how am I gonna get back down??" As it turns out, when you reach the top, there are other trails you can take down. The one closer to the creek is notably less slick and less steep. I unfortunately do not remember the name. Once you get to the top though, wow! Gorgeous views of Boulder and the surrounding foothills. Climbing on the rocks at the top is pretty fun too. Overall this was probably the most "scary" hike I did while in Boulder (but not the most demanding) because it is less maintained than the Eldorado Canyon State Park and the Rocky Mountain trails that I did. But it is still pretty easy, just a bit slippery. Use hiking sticks and you should be fine. I think this is a must do when in Boulder.

Gregory Canyon - hiking - Updated May 2026

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