Pancakes are amazing. I have yet to try a plate I do not like and I've been going for as long as I can remember (shoutout to Flappy Jacks!). The service is always quick and cozy. Try the breakfast burritos! Note to self-- stop inhaling the food just because it's Stacks and take a picture first! read more

Who knows when it's open? It's 6:40 pm on Saturday and they're closed. Third time this has happened.

Stack on Route 66 is a wonderful restaurant to hangout with friends and enjoy your time. The restaurant has vivid vibes. I went with my friends on Friday morning to have breakfast. We were greeted and seated inside once we got there. The place was packed by this time.They have both indoor and outdoor seating. The vintage murals around the restaurant looked very nice. The decor was beautiful.Then, it came our time to order our breakfast. Everything was tempting in this menu.They had a large menu filled with many tasty options. Finally, I chose salad and strawberry waffles.The salad was very fresh, and humongous. I was full, so I took my strawberry waffle to go. The waffle was crispy from outside and fluffy from inside, the best waffles I have had in long time ago. One of my friends ordered salad only and the other one ordered salad and strawberry waffle combo. It came with hash brown, sausage and eggs. We ordered coffee. They refilled it many times. We were there for more than two hours. It was really fun. The staff were very welcoming and energetic. Honestly, they were moving all around the place to serve each and every customers.The service was top notch. Great thanks to the manager, Hannah and Luke. We had such a pleasant morning and we enjoyed our breakfast there. read more

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Food was really good but the waitresses were clueless. Our waitress went back 3 times because she didn't get the right amount of utensils for the table. Very irritating morning. There was 4 of us and the bill was 90.62 I had asked the lady at the register to split the bill and my mom paid 65 in total while I paid the rest in cash because the lady couldn't do simple math. read more

I came here to meet with a friend on Sunday morning. Luckily it wasn't too busy yet, but just a few minutes after the line started getting long. This place looked familiar, and my friend reminded me that we had ate here years ago when it was called Flappy Jacks. I ordered the banana walnut pancakes and my friend got the stacks omelette. The portions are ginormous and pretty good. I'm docking one star cause I asked for my eggs well done and both times they were sent to me as runny. Overall a great breakfast choice in Glendora if you're ever in the area. read more

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The restaurant seems like the type that is always busy during a weekend breakfast. Which shouldn't be an issue you can be busy and still have processes in place that allows for all of your guests to have an enjoyable experience. The food was great, portions were decent, price was slightly much (even for the portions given). Very tasty and served exactly as described on the menu. I did not have the worst experience but also can feel the pain of the staff and other guests because of the lack of management or pure disorganization of the place. Multiple times I saw the hosts/managers asking people who they were on the guest list. Not that this is entirely a bad thing but the loud, rude way in which they did made for a lackluster experience for those already seated and eating on the patio. Speaking of the patio, it looks like a half hearted attempt at expanding the seating of the restaurant. The outside "waiter service area" was not the most appealing to the eyes. There was a blue tarp half hanging off part of the patio roof. Beyond that, one of the managers throwing plates into an ouside bus tub that ended up falling out and almost hitting another guests foot was not ideal either. The same manager/host ran around grabbing people and seating them at a table when apparently another employee has already promised that table to guests that have been waiting. We had the runner bring us food that was meant for another table and it seemed like no one really knew any table numbers. Again, so much disorganization it is hard to summarize it all which is sad because the former restaurant this place was used to be pretty great with service, food, and all around experience. I hope they step their game up and provide a better customer experience to future guests. read more

Stacks On Route 66 - Banana Nut Waffle - American Near Me - Glendora, California

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I have been here plenty of times, if you want a warm hearty meal this is the place to go. Most days there's a wait but we'll worth it. Food and service are great. I went in this morning and Alejandra was our waitress. She was the most helpful and sweetest waitress. You're lucky if she waits on you. Thanks Alejandra for taking time with us. read more

Stacks On Route 66 - BREAKFAST WRAP - American Near Me - Glendora, California

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Service was slow, French toast filling looked like cottage cheese. Not a blend of sweet cheeses. Would not order again read more

We had an absolutely wonderful experience at stacks on route 66! We were seated on the patio which had nice heaters for the chilly morning. Our waitress and staff were very friendly and attentive. My husband ordered the stacks omelette and described it as the best omelette he has ever had!! It is gigantic with tons of meat and cheese and delicious veggies. I had the stuffed french toast which was absolute heaven! It was filled with a cream cheese cottage cheese (?) Mixture and a side of strawberries in a light glaze. Highly recommend! All of our girls had chocolate chip pancakes that they all said we're delicious! The coffee and juices were great as well. The prices were a bit high, however we were visiting from out of town and it may be just that we were not used to the prices. All in all, we highly recommend this little gem for a great breakfast with a picturesque view of the San Gabriel mountains! read more

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This is my first visit to Stacks On Route 66. I have fond memories of Flappy Jacks until it became so popular that it wasn't worth the hour and a half wait to be seated. I was surprised to see all the outdoor seating they have created. It's a nice option to be able to choose whether you want to dine in or out. The menu looks much the same as it did when it was Flappy Jacks. However, the food was of average quality and nothing memorable. Hubby mentioned his pork chops were a bit dry and the pancakes were not as fluffy as he remembered and slightly burnt. Polish sausage was okay. But...how much can go wrong on basically sausage and eggs. My friend seemed to enjoy her double cheese omelette. The toast and the pancakes were a bit slow in making their appearance. However, I was very disappointed in the cleanliness of ladies restroom. There was no toilet paper in one stall. No soap in one dispenser. Used paper towels overflowed from the trash receptacle. read more

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Terrific customer service by Stacks On Route !! Such a great customer service by everyone. The food is so good especially El Paso omelette read more

A cozy diner with great service, say less! Servers within in the same seating section kept checking up on us. They all made sure we had what we needed throughout our entire dining time. Blintzes Crepes -texture of crepes was quite thick and dense. There was no bounce to the crepe at all, it's more of a really thin overly mixed pancake. Blend of sweet cheeses threw us off a little, definitely had cottage cheese and cream cheese mixed in it. I didn't mind the cottage cheese curds throughout the sweet cream but that texture might gross others out. Banana Nut Waffle -waffle was crispy on the outside with a light and fluffy inside. Who doesn't love whipped cream? West Coast Skillet -mostly topped with chicken and mushroom with a bit of chopped tomatoes, there was 1 dime sized broccoli on it and I thought it was accidently dropped in. Now I'm looking back at menu it was suppose to be on there. Overall still good! Chicken had a good char which added so much flavor. read more

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Idk how this restaurant is so popular the food is horrible! We went for my son's graduation eighth grade promotion and it wasn't busy, and I only ordered scrambled eggs. They forgot about my order. My dad's pancakes came out until he was done with his plate. The waitress kept blaming the cooks, but nothing came out Good up with any of our plates! My mother-in-law's pancakes came out late as well and they forgot my daughter's plate ! I've been here twice and both of the times I've had a horrible experience. We also sat outside go elsewhere don't waste your time at this point IHOP is better or Denny's. read more

The last time I came here it was called flapjacks but essentially it seems the same! I ordered an omelette, that said it was 4 eggs but maybe more it was huge both our plates could be enough to feed two. They come with large side portions. Perfect place to scratch the American diner itch :) read more

Stacks On Route 66 - STACKS FAV SKILLET - American Near Me - Glendora, California

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The manager treats employees unprofessionally and communicates in an insensitive and disrespectful manner. The workplace environment is uncomfortable and unsupportive, and the sanitary conditions need significant improvement. Employee concerns do not seem to be handled appropriately. read more

This is my first time coming since they bought the other restaurant that used to be here. I ordered the bacon waffle and upgraded to a combo which included your choice of bacon, sausage, or hash browns. I chose the hash brown and egg as my combo. The bacon waffle was really good, I was just under the impression the bacon was cooked into the waffle and not just sprinkled on top. The sides were normal and no complaints there. Overall, the food tasted really good and would go back. read more

Stacks On Route 66 - 2 EGGS AND HASHBROWS - American Near Me - Glendora, California

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Avarge food and way too much,service is spotty due to how busy they can get. The prices are one of the highest in the area for sure.

The bald guy in front is rude and doesn't make eye contact he is lucky the food is good

Back again!!! Just wanted to update my review and state this breakfast place is still a gem!!! Our wonderful service recieved today was provided by the lovely Siera (sorry if I spelled your name wrong). She was attentive, caring, got our order perfect and kept coming back to check on us even checked on my silent pre-teen who didn't want to order anything. So sweet. Our food was perfect. She ordered everything perfectly. The cook is magnificent. The vibe is breakfast diner casual and feels perfect for a family of 6 like ours. Love this place. 10 out 10 highly recommend again!! We will be back read more

Stacks On Route 66 - American Near Me - Glendora, California

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My wife ordered some pancakes, eggs, and bacon combo. I just ordered a grill cheese for breakfast. We don't like to complain. Seems like it is not the same as it was when it was flappy Jacks a Sunday and not crowded. The grill cheese was only OK . Seemed like they only used one cheese. The eggs my wife got were a weird consistency and tasted bad. So she just ate the pancakes and trimmings. Another table next to us sent back their eggs and we asked them if they were a lot better. They said absolutely. The waitress noticed us talking and brought out a new meal of eggs. The manager came by and apologized. But stopped short of acknowledging the eggs were old or what happened ?? A lot of kitchen staff seemed like standing around. The offered to comp us for the breakfast and would not take our money so we put the cost of the meal as a tip to the waitress. Seemed like things were off and did not have the standing only demand like when it was flappy jacks. read more

The most delicious food i had for a long while. Is Worth to go back again. Good size portions and the price is fine. The service is excellent with a smile and fast. Classic and family oriented read more

Had breakfast here after getting a procedure which ment I had to fast for 36 hours- I was super hungry and this place serves large portions. Inside has tons of memorabilia from old Route 66 days. Had the mushroom omelet that my wife and I shared as it was 4 eggs. Also ordered a short stack of pancakes that were big and fluffy. Next time I will go for the skillet breakfast for sure. read more

Stacks is one of our breakfast spots. We tend to go here from time to time. The portions are big and they have a very large menu. My favorite is the Avocado toast with eggs and arugula. My husband loves the banana nut pancakes. There is always a line here but it does go by fast and worth the wait. This is an excellent place for big parties and food sharing. read more

Came here today and had a server named Katie I believe. She was a fun server. Super up beat. Funny. Just seemed like an all around good person. Kids loved her. she made my wife laugh and I know that's hard to do lol. She was very attentive and on top of her game. Food was great. Order came out in a timely manner and on point. Place is loud because it's busy. But seems like they have it under control. I will absolutely be back. Hope to get Katie back as our server! She was great! I'd give her a 6th star read more

Arrived around 2 PM on a Tuesday afternoon for lunch. Wait staff was great. I ordered the classic burger and added cheese, chose the pasta salad, and upgraded to fried zucchini. The fried zucchini was amazing. The pasta salad was not at all good. As typical, I was asked how I wanted my hamburger meat cooked so I asked to get it as rare as I could so I was told I could get a medium. And as I have found in so many restaurants (I understand the need to cook ground meat to a certain minimum temperature.) that really means very well done. In this case, there was not even any moisture left so it made the burger very dry so I ordered some mayonnaise to try to help and then I ended up adding ketchup because it was just very dry. It was a very large serving. But because it was so dry I would not recommend the cheeseburger. read more

Positive attitude A+ Friendly A+ Welcoming smile A+ Attentive A+ (Checks on you, but not overbearing) These "A+" are why Sienna deserves a shout-out! Thanks for making everyone welcome. read more

Love this restaurant! I went here for the first time in March 2026 and it was awesome. Our server Letty was so great- super friendly, good food recommendations, and very attentive. The service in general was very good- we had people coming by with coffee and water refills so we had everything we needed. And the best part: the food was delicious! A lot of menu items were in the $15-$20 range but they give you your money's worth. We had the cinnamon swirl French toast and a Benedict, and both were so tasty and large portions. Highly recommend for a great brunch- I'll definitely be going back! read more

We hosted our Covina Picklers Early Birds pickleball team's birthday celebration here. It was an absolute smash! The staff accommodated our team's needs perfectly, helping us coordinate table space and bringing out the birthday treats right on cue. The entire staff is absolutely wonderful, very friendly & attentive. Coordinating a meal for a large group can be a nightmare, but they were incredibly fast & organized. The portions were hearty and delicious, perfectly refueling the team, and with the quality of the food shining through despite our large numbers. A special shout-out to our server "Kayla" who kept up with our rowdy energy and our endless coffee refill requests with absolute grace. We love you Kayla! Highly recommend for any sports team or large group celebrations. We are definitely coming back for next month's birthday breakfast celebration! read more

a little expensive, but worth it. food is always fresh and hot when delivered to your table. waiters and waitresses are always helpful and patient. it is a little noisy but the overall ambience with the route 66 cars highways and things makes it a unique experience. read more

Food isn't like it used to be, taste like they cut costs no flavor on the chicken fried steak. Service was excellent. read more

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As a local and regular, Stacks on Route 66 is by far one of my favorite spots and never disappoints. The breakfast is consistently amazing, and the staff is always friendly, attentive, and welcoming. My go-to is the Neptune, but honestly, you can't go wrong with anything on the menu--sweet or savory, the variety and quality are always there. You can truly feel that the staff is treated like family, and that care shows in the atmosphere and service. I also want to give special recognition to their limited-time Thanksgiving dinner, because it deserves it. I recently lost my mom and wasn't in the headspace to celebrate on Thanksgiving Day. The day after, my partner and I wanted something low-key but were still craving a comforting Thanksgiving meal--and Stacks delivered in the best way. The plate was generous and thoughtfully prepared: tender slices of turkey with gravy, classic stuffing, creamy mashed potatoes, cranberry sauce, fresh vegetables. They also offered the option of adding a crisp side salad or soup. The photos really speak for themselves. Turkey is usually hit or miss for me and often too dry, but this one was perfectly cooked, moist, and full of flavor--one of the best I've had. This experience also showed me that Stacks is more than just a brunch spot. They offer quality, care, and comfort when it really matters. As always, I'm grateful for the consistency, heart, and attention to detail that keeps me coming back. Highly recommend. read more

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Love coming here with my dad in the mornings I absolutely love the cherry compote. That is literally the only reason why we go there to eat is because I love anything cherry and this is the best cherry compote that tastes absolutely amazingly perfect. The service is always amazing. I love coming here. It's always packed and busy. read more

Stacks On Route 66 - BAN NUT WAFF - American Near Me - Glendora, California

This morning ~11:00, my family and I came into Stacks for a nice Saturday morning brunch. Right... Thankfully we were able to put our name in via Yelp, which was great and saved us half an hour of waiting. Otherwise, you'll have to wait quite a while, no matter the time, seemingly. We were seated outside, which is fine, since it's actually quite a nice day. The spacing outside is a little cramped and slightly awkward, but no big deal. We almost immediately ordered drinks, and about five minutes later, ordered food. I personally, got a raspberry iced tea and stuffed French toast. The food took probably no more than fifteen minutes to come out, which is honestly great, considering most brunch places. The food was fine, but honestly not much to rave about. The French toast was more like blocks, stuffed with some sort of cottage/cream cheese. It came with an option of strawberry or cherry glaze syrup (which I opted for strawberry). I got it as a combo, with scrambled eggs and bacon. The eggs were slimy, likely a result of being cooked in a large batch with too much oil, which is disappointing. Only ketchup could really drown it out. The bacon was just okay, but tough and cheap. If you aren't big on sweets, this plate really isn't for you. The syrup didn't help at all, and was sickly sweet. I could only eat one fully, and they were definitely better with regular maple syrup. Everything was just mediocre. It was a fine place, but for what we got, it's honestly just overrated. Our server wasn't all that attentive, and we didn't even get a name, so. Yikes. The inside was fine. Obviously we didn't go in there too much, but it was a little chaotic, at best. The bathroom was fine, small, but no big deals there. Overall, for the service and quality, the place is overrated and expensive. read more

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Food tastes great and plentiful! Waitress constantly checked on our table, refilling our water, coffee and juice cups without us asking! Very cute spot that takes your eye back to the 60,s - 70's. Loved it! read more

The French toast and pancakes at Stacks are so good! Love that you can make it a combo and add eggs and sausage or bacon for something savory. Plus their coffee is refillable which is a nice touch. This place gets busy on weekends but there's usually plenty of seating before 9 am. The servers are super friendly and it's good vibes all around in a classic diner setting! read more

Stacks On Route 66 - Make it a combo - got eggs over easy and sausages - American Near Me - Glendora, California

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My wife and I went there for lunch, it's been a long time since we are there. We thought we'd give it a second chance. The quality of the food there just isn't good. I ordered a hamburger and fries and the burger I requested medium and it came out well done and it was like eating cardboard. The fries were fried and dirty oil because you can taste that the oil has been not changed and probably over a week. And this was an $18 burger with a plate full of fries to make it look substantial. We will not return. God, please bring some good restaurants to Glendora. In-N-Out burgers are so much more superior and half the price. That's my recommendation. This is strictly my opinion, but it comes with 30 years of culinary experience in the food service industry. read more

Food and service is amazing. Wish I could post a picture of my food but I ate it so fast cause of how good it was.

Food is good, but I do feel the flavor has gone down a bit in some dishes. The last time I went their hash brown was very salty. Service: expect to wait a bit because it is a popular place, but I don't think it's ever felt like a super looooong wait. It usually looks packed and people waiting outside, but don't get scare the line moves moderately. Ambiance it's a good place for family and friends with outside and inside tables. read more

Stacks (on Route 66) is unflattering chaos. I bite into my country fried steak, and I spit out rubbery cartilage twice. (photos attached) The location over-seats tables, and I am surrounded by frustrated servers getting overwhelmed and loud irritated families complaining about slow service. I arrived on a weekday at 10:20AM. I was immediately sat down. My server never returned, so I waved someone down to give an order. I ordered the Country Fried Steak ($17.99). The dish includes eggs, hash browns, and pancakes. I waited 15 minutes. The pancakes are thick, warm, and bouncy. The scrambled eggs are soft and fluffy. And the hash browns are crisp and tender despite being a little salty. Unfortunately, similar to the frantic servers, the country fried steak's meat patty was rushed. I had to spit out two inedible flaps of rubbery cartilage. I can hear the table beside me complain about slow service. Stacks (Route 66) over-sat customers, and the dining experience result was uncomfortable and impersonal service. I rarely saw my server (Sophia). Thankfully, the other male staff member helped with my order. This diner's food portions are generous. Unfortunately, Stacks provides a chaotic, uncomfortable experience. I can't recommend. read more

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Food and service are quick. The only thing is I don't feel they come often to check in, as we sat for a good while with no refills. Other than that it's understandable when they are busy. Food is always delicious. Atmosphere is great overall. The menu has a big selection for everyone! read more

Stacks On Route 66 - AVOCADO TOAST - American Near Me - Glendora, California