Explore the best trails near Boulder with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.


trail running



wild flowers

kid friendly

nature trips

dogs on leash




mountain biking

dog friendly

horseback riding



wheelchair friendly


no dogs

road biking

Boulder, Colorado Map
17 hours ago

Well maintained but challenging. Took 4.5 hours under dry conditions, with minimal stoping. Would be a bit treacherous if wet due to traversing a lot of stone, which would be slippery.

Had a blast with this hike. Took the advice of a previous review and went up Mount Sanitas and down via Sanitas Valley loop. Took me just under an hour to reach summit with lots of breaks for the scenic views. This is a totally do-able hike it was difficult at times and required some hands to stable the climb but that just made it all the more fun.

1 day ago

Loved the trail! Definitely a great work out! Plus it has beautiful views of Boulder and the flatirons (especially in Fall).
If doing the full loop, it seems best to go up mount Sanitas trail and down the valley trail. This allows for a nice and easy ending to the hike.
Only negative is that it's extremely hard to find parking for the trails in the area. Went on a week day and still struggled to find a spot.

Loved this quick hike! Overall this trail is accurately marked as moderate simply because of the incline at the last part of the hike. Definitely not too strenuous - I carried my two year old niece in my arms up the incline and most of the way back (our hiking backpack decided to malfunction before the hike). Not a crowded trail whatsoever which made it even more enjoyable! The view was gorgeous at the top! Parking is on the side of the road - lots of room to pull off to the side.

off road driving
1 day ago

Drove this trail today. Easy ride with nice views. As long as the road is dry you can make it through with 2WD.

Nice smooth trail with switchbacks most of the way. Beautiful scenario of mountains and forest. Much better on the knees and joints.

Great trail for a short day hike. I started at 9:40am on a Thursday and got to the arch in an hour and a half. Took about an hour to get down. Parking lot was full when I got there and the trail was busy at the bottom and the top but I was alone on the trail for most of the time. Lots of stairs toward the top so be prepared for that. I brought trekking poles and that helped save my knees on the way down. Well kept trail that is fairly easy to navigate.