Explore the most popular trail running trails in Boulder Open Space with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

My favorite cardio trail. But very populated.

1 day ago

05/19--Did this trail after the 1st and 2nd Flatirons hike. Being from flat land made this pretty challenging and the weather didn't help. However, the feeling of looking up and seeing the arch was so worth it. Amazing views at the top.

1 day ago

5/22 great workout, good views, easy trail to follow. Lots of wild flowers. Too many people on the trail...even on a Tuesday. I went clockwise. Also plenty of trash (collected everything I saw), and dog poop bags. Instagram ec_boyd

Kids loved it but lots of loose rock and mud.

Great trail with some steady inclines. Nothing too crazy but defiantly a good workout. Plus some of the views are amazing!

Loved this hike! It’s pretty steep but the view is amazing

Hiked with the doggo on 5/22/18 - started at about 9:15 and was at the summit by 9:50 including taking a couple viewpoint breaks, didn’t see anyone going up but started to get busy on the way down. Some small uphill bursts throughout and then gets decently steep at the very end - definitely had me panting and grumbling to myself but then the view is awesome at the top. My dog (80lb) had a blast. Lots of shade, VERY green after all the rain, no ice, and pretty wildflowers! Beautiful way to spend a morning.

This hike is moderate to hard as it’s uphill the whole time but is short in distance! The views at the top are totally worth it. Some steep parts make it a little tricky for my dog but she made it. Love doing this hike and running the road part back down (about 2/3 of the way back down)!

opening screen says trail is moderate, but then once inside the specific trail it says hard(which is way more accurate). But that being said, absolutely gorgeous hike! the view is absolutely stunning!

Awesome hike with the pup!

Great hike for the dogs- lots of shady spots and beautiful views.

Cute hike! Last bit gets your heart pumping. Love the view of Boulder.

Hiked on 5/20. It was a cloudy day so we didn’t get any views, but it was still fun! The trail was muddy but passable. Not a fly in sight. Met lots and lots of friendly puppers!

Nice quick hike, pretty rocky with some steeper sections. Decent view at the top, though it was cloudy so it might be better when it’s clear. Lots of people and dogs were out on a Sunday morning.

This trail kicked my butt. Bear canyon trail was really scenic. The nats or flies were terrible. I couldn’t even get a photo at the top they were so bad. I hiked the West ridge and came back down the same way. Fourth hike of the season I just wasn’t prepared. I could barely walk by the time I reached my car. I have done bear peak from fern canyon before. It seemed much easier than coming in from the West. All in all it was a good hike and am glad I did it. 5/17/18

Trail was packed with people as expected. This hike is okay for a starter hike to season but not my favorite. Did this on 5/7/18. It always seems harder than expected too.

4 days ago

Hiked this on 5/8/18 it was amazing! The weather was great and the views perfect

This was our first hike since moving to Colorado, and we LOVED it! Definitely has some trickier parts, with climbing up rocks, but it was a really fun, rewarding hike. It was foggy when we did it, so we didn’t get to see the view from the top, but we’re definitely going to make this hike again.

4 days ago

Great casual hike. Not too hard and not many steep inclines.

Beautiful trail! Very rocky in many spots so made running difficult for a lot of this trail. Good hills and great views though!

Loved the view on top and the wildflowers on the way up. Not too crowded. Good workout for sure.

Beautiful view of the city and great for trail running if you hike counter-clockwise!

7 days ago

My friend and I did this hike today and we thought it would be useful to give a few tips.
1) make sure to bring an adequate amount of water
2) mentally prepare for a long, a very long, hike
3) an early start is ideal
4) when it gets hard, keep going!
After we completed the hike, it was a huge accomplishment. It’s well worth doing it (the view is awesome towards the top). However, we didn’t make it to the very top because we literally were attacked by flies; I think some died in my hair, if I’m being honest.

It was steeper with more boulders than I anticipated. Good day. Good hike. A lot of people on the trail.

7 days ago

Great hike! Got there at 7 in the morning and barely found a parking spot. Which had me worried but the traffic on the hike was non existent at this time. I didn’t notice many people until I was done at 10. I feel the difficulty is rated a little high on this. Nice steady incline with a couple spots to recover on the way up and along with that it’s well covered with shade. The hike offers a lot more than just the arch to enjoy. A must do hike if you ask me!!!

7 days ago

Beautiful trail showcasing all the beautiful life spring in Colorado has to offer. Great workout and views, my dog loved it!

Excellent hike with incredible 360 views

awesome hike, well worth it

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