Explore the most popular walking 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.

6 hours ago

360 view at the top. If you are not in good shape you should reconsider; the climb is pretty steep and steady once you get off Mesa Trail. If you take Shadow Canyon trail up make sure you stay right when you hit the rocky area that you feel like you have potentially lost the trail. Great view though, def worth it.

10 hours ago

Absolutely worth it and STUNNING

Good place for a nice stroll in the evening or after work.

Awesome hike! It is not easy tho

13 hours ago

never go there if its wet or rainy

Great views from the top. Flat most of the way and then a steep incline to the top of Green Mountain. Easy to navigate and not that hard with a few water breaks.

View at the top was better than I was expecting. Great hike - the climb to the top is a little strenuous but the rocks/steps are very easy to navigate

I read a few reviews that said this was a great beginner trail and I disagree. This trail, on both sides of the mountain, has a lot of climbing and scrambling on rocks and I'm glad I wore decent hiking boots. The trail was a bit crowded in parts and definitely a workout but some of the views were nice.

14 hours ago

Went to Bear Peak before coming here. The climb to the peak isn't hard, but the flies at the peak are annoying.

14 hours ago

Beautiful hike! Continued on Mesa trail instead of going the shadow canyon route. The hike is easy up until about the last three quarters of a mile in which the ascension to the top is pretty tough. The flies at the peak are fairly annoying but they don't bite.

1 day ago

My girlfriend usually takes about 200 pictures per hike. This hike she took at least 500. Great views.

Great views. Steep hike. Lots of people on a beautiful day. Landed in the morning from the east coast and jumped on this trail right away. Due to the elevation gain, we got tired very quickly. Drank lots of water. Fantastic day to start our vacation.

Don't let the wild flowers fool you, this beautiful hike is steep and long. One of my favorites! Great on Thursday with few people.dont forget it's $5 for parking

Pretty hard trail but not too bad! Path can be unclear at times as you have to actually climb over some rocks but it's a beautiful scene once at the top! The trip down is quick and easy which makes the hard trip up not so bad!

Pretty good hike overall. Flat and then incline to the top of Green.

My favorite cardio trail. But very populated.

4 days 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.

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.

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