Explore the most popular hiking 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.

Nice difficult trail......great workout and view at top! Very good local hike.....

Difficult but great view at the end!

Love this hike. Breathtaking views valley

Short loop around main base area of Chataqua. Great views of the flatirons all around

Great quick route to do some stairs and elevation gain quickly and come back the same route or loop around a number of ways.

Flatirons are so beautiful and such a classic hike

The long way to get up to Flagstaff summit from the base of the canyon. Climb up gregory canyon then cross the road where there is parking just off flagstaff road if you'd rather start with a smaller amount of elevation to climb.

1 day ago

Short easy loop around the base open fields of Chataqua great views of the flatirons

Great loop around Chataqua through open fields and a bit of the forest

1 day ago

There are many routes to the top! be aware when you finish the switch backs that run doing the creek there is a false summit. Go past the trail marker and you'll have to head down for a little bit before a short climb back up to reach the Arch.

trail running
1 day ago

It was pretty busy today. There were lots of dog walkers. The weather was great right before the snowfall expected tonight. Terrain was pretty easy - an occasional big rock jutting from the trail but not bad. Great views though!

Challenging for a recreational hiker & worth it - beautiful views, the arch did not disappoint!

The loop we followed was Chautauqua to Meadow to Gregory Canyon to Ranger to the summit of Green Mountain to E.M. Greenman to Saddle Rock to Gregory Canyon to Meadow - almost 10miles. Very strenuous on the way up, took almost four hours to summit - we are not from this altitude. Absolutely stunning and worth every grueling bit :)

Amazing trail very well worth it

nice short hike

Started at 7am to beat the crowds (and get parking)! Hiked around to the back of the first flatiron to view the front range.

My husband, friend, and I hiked this back in 4/2017. It was pretty much my first “real” mountain hike and will always be one of the most meaningful to me. I have a thing with heights but we made it to the tippy-top of the 2nd flatiron! If you’re planning on “celebrating” definitely wait until the top haha. Even if you’re not the most experienced hiker and it’s intimidating, go all the way - you won’t regret it. I definitely recommend appropriate footwear and gear (lots of water if you’re not used to the elevation)! We will be back!!!

2 days ago

Really beautiful hike with flowers and an amazing view, very well worth it. make sure to bring lots of water!!

A lot of trail options and easy to navigate. Somewhat muddy.

Awesome hike. Trail is well traveled and moderately difficult in some areas.

great views and rocky trail makes for low mud on the rare rainy days in BoCo.

We got lost several times on other side trails and had to turn around and walk back so make sure you pay attention to the route and signs. Other than that, a beautiful hike. We did encounter several piles of fresh bear sh**. So be cautious. :)

7 days ago

The arch itself is beautiful. But it is clearly not a trail that deserves a "hard" rating. Most of the hikers on this trail were in casual wear and made it to the top. We saw more than one woman carrying her purse and wearing flats. If you have the gumption and the time, you will make it to the top.

Gorgeous views, different types of terrain on the way up. Lots of traffic for a reason. This is a must in the Boulder area even if once. The Flatirons are stunning. The ascent is steep at times, but it’s manageable even for this visitor from out of state.

8 days ago

Amazing trail! Why is everyone complaining about the crowd. If I was the only one out there struggling, is it even really worth it?

Step clim but completely worth the views! Very transited.

Hiked 10/4. Mesa trail to fern. Strenuous constant uphill the last mile. Fun scramble at the top!

Beautiful hike, even through the haze. Awesome views - and loved the drive up!

Great but strenuous hike! We took Homestead trail, which is a small offshoot to the left as you’re heading in, to Shadow Canyon. We enjoyed Homestead because it’s less trafficked and smaller than Mesa trail, which is sort of like walking on a rocky road, but you can take either to get to Shadow Canyon. Shadow Canyon gets to be quite difficult, but is well worth it when you reach the top. Excellent views into the mountains and of Boulder. It took us 3 hours to reach the summit with a few short breaks, and 2:20 to get back to the parking lot. We were worked but satisfied!

We went up Mesa trail to Shadow Canyon to South Boulder Peak trail. We somehow missed Towhee trail and couldn't find Homestead so we took Mesa. That added mileage. The trails are beautiful, especially in the fall. You climb in ernest on Shadow Canyon trail. It's definitely hard but not the hardest I've hiked! You are scrambling at some parts of the trail but mostly just large steps/lunges. Overall great hike! Parking is $5. Get there early for a spot, like 11am?

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