Explore Boulder Trail Runs - view hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

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I hiked down this from Mt. Sanitas. I will definitely be back to run up!

trail running
9 days ago

Steady climb and overall fun run.

Difficult & steep trail run, but well worth the efforts

Climbed 11/10/18 - Sanitas generally stays drier and more snow free compared to nearby mountains like Green or Bear which makes this a great mountain for a workout hike or trail run. Quick and easy. Always seems to be more crowed than Green or Bear. Views from the summit are only of Boulder and you cannot see anything west:(. Additionally the summit block is small and crowded which was an annoyance both times I climbed it. So this is a great workout mountain and is fairly fun but the views and solitude are lacking compared to neighboring mountains..

Easy relaxed hike.

Going counter clockwise on the trail was a bit difficult, the trail was tricky at times. Unfortunately I went on a cloudy day but if you are looking for a trail to get a sweat going this is a great one.

hiking
15 days ago

Well-maintained trail with great views of the canyon. Some parts of the trail are icy - wear YakTraks if you have them and your trek will be much more enjoyable. Dog poop on the trail both in and out of bags. There is an $8 fee to enter the park.

Did this trail when first visiting the area..definitely was a little challenging on the way up! Was a great workout and the view at the top is awesome.

Tried to hike this today and it was covered in ice. Decided to turn back shortly after we started. Definitely recommend spikes at this point in the season, especially with the high winds we have had recently.

This was a great workout. The views are amazing. There is lots of stairs and boulders to go over. A bit missing and icy on the back loop going down.

hiking
20 days ago

Great hike, I would agree with another poster that it’s moreso easy rather than moderate. There were a few icy spots, but we were fine without our spikes. Beautiful views, well maintained trail—I would come back.

love this hike! have completed it a couple times. great to take out of towners who want to see our beautiful canyons, feel accomplished, but not terribly difficult. lots of areas to stop and enjoy the views. fun seeing the rock climbers throughout the canyon. interesting history with the hotel ruins.

Really great views of Boulder. Definitely an asskicker at times, though not always. Trail was in good condition, with lots of people taking advantage of perfect hiking conditions.

hiking
25 days ago

I love this trail. I completed it last month before the snow. The nature and views are beautiful. I loved watching the train pass in the distance. I am a Colorado native so I never really feel inclined to go back to most trails but I will definitely hike this trail again. There is an $8 fee to get into Eldorado State Park, or $5 to park outside the park and walk in, but you can tell the state park puts the money to good use. This has to be one of the cleanest trails I’ve seen. There aren’t too many tactical areas. I went counter clockwise at the loop, so going down the incline back to the trailhead was rather rocky and steep. I almost fell at one point, but it was only for a short stretch.

The definitive Boulder workout. One of the first to try if you are only here for a short while!

Trail was closed today. Hiked this before with my dog and she loved being off leash with the cows. Special dog tag for voice control needed for off leash capability.

hiking
26 days ago

Didn’t actually do left hand as it was closed due to mud. So did sage instead, which was also incredibly muddy.

There are rattlesnakes so be careful, but don't miss out! This is a great workout for people looking to improve beginner hiking skills. Lots of great views, really cool area for rock climbers, and a little history hidden on the trail.

I would have liked to pick up the pace to get a better workout in, but the trail was pretty crowded (granted, it was midday on a Saturday.) Overall it was a nice trail, great views at the top, and fun to watch climbers on the opposite rock face. My friends and I maintained regular conversation without much huffing and puffing and there were plenty of kids on the trail, so I’m not sure if deserves a “moderate” categorization, but it was a great outing for sure. Saw some cool birds, too!

Lots of snow this morning! Make sure you are prepared if hiking in the snow. About half the trail I was second person then almost all of Flagstaff on the way back down was breaking trailhead. Snow ranged from 2-3" to about 8"-10" deep at points. Waterproof boots are a must. I did wear spikes but didn't really need them for the most part. Not a ton of views due to currently snowfall. But there were several spots where it was still very pretty despite minimal views. I would def do this trail again when it isn't snowing. Worth the hike for sure.

hiking
30 days ago

Great trail without a lot of loose rock and fairly easy footing. Steady inclines and great views made the hike really enjoyable. Parking can be a bit tough but the hike is well worth it!

Great trail and beautiful views.

got there at 10 a.m. yesterday only a couple of cars in the lot. though there's not a lot of spaces. well maintained trail. nice steady incline for first couple of miles. the view at the top was beautiful! bring layers! started off needing 2 jackets a hat and gloves went down to just day clothes as we got going.

Amazing fog this am with snow flakes. Trails dry with friendly people and amazing views. Happy Thursday m8y's Oiiiii

Lots of steps up (45 min) but worth the reward. Easy hike down.

Great views of Boulder. Decently trafficked by people and easy to find the trail. Around the peak it does get pretty rocky so good shoes and sure footing is highly recommended. Haven’t hiked in awhile and did the loop in a 1 1/2 hours with a longer break at the top.

Gorgeous trail. Strongly disagree with the "hard" rating-- it's difficult for a relatively short period of time, so I think it's more in the moderate category. It was actually rated moderate on alltrails until about a month or two ago.. not sure why it was changed.

This trail is short, energizing and has better views than some of the even harder trails in Boulder.

Hiked this my first day in Denver so getting used to the elevation was a little rough for me. But overall I thought it was a great hike! The overlook was incredibly beautiful and while the trail was a bit rocky in places, it was mostly flat and wide with a slight constant incline to the top. I am not an avid hiker and a bit out of shape so I thought it was the perfect combination of a challenge, scenery, and length.

mountain biking
1 month ago

Fun to cruise through on a mountain bike. Perfectly smooth trail most of the time.

Good trail running. You can feel like you are in the hills with close mountain views, yet not feel the pull of elevation gain on your run/hike.

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