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Mount Sanitas and Sanitas Valley Loop Trail

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Boulder Open Space

Mount Sanitas and Sanitas Valley Loop Trail is a 3.2 mile heavily trafficked loop trail located near Boulder, Colorado that features beautiful wild flowers and is rated as difficult. The trail is primarily used for hiking and running and is best used from April until October. Dogs are also able to use this trail but must be kept on leash.

Length 3.2 mi Elevation gain 1,256 ft Route type Loop
Dogs on leash Hiking Running Views Wild flowers Wildlife Rocky Snow No shade
Description
Waypoints (3)
Contact
Getting There

While parts of this hike are dog friendly, dogs are not allowed on the Lions Lair section of the trail. A wonderful "desert like" hike with great rock formations, vistas of Boulder CO, and rock scrambling if desired. The terrain varies from open meadows and wild flowers, to rugged boulders and projected rock outcrops. If parking lot is full, roadside is allowed.

Colorado Tourism Office, 1625 Broadway, Suite 1700 , Denver, CO, 80202, Phone: 800-COLORADO

Directions from Broadway: Traveling north passed the University turn left on to Mapleton Avenue. The trailhead lies approximately seven blocks west of Broadway.

Weather
UV Index
Daylight
Reviews (2146)
Photos (1826)
Recordings (1509)
Completed (7165)
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Kelcie Dismuke
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HikingGreat!

Definitely would recommend hiking boots, very popular trail.

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Chuck Brandey
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Road biking

Wide bicycle shoulders on Highway US 36 and Lefthand Canyon Drive. Old Stage Road does not have a bicycle shoulder. Lots of traffic on Highway 36 with little traffic on Lefthand Canyon Drive and Old Stage Road. 80% of the elevation gain is on Old Stage Road.

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Madison Broader
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Hiking

really a nice trail :)

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Ajaylla R.
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HikingGreat!Rocky
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Olivia Dorencz
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HikingRockyScramble

Rocky and steep but fun! Surprising amount of shade on the Mt Sanitas trail going up. Smoke definitely made it tougher and the views a little obscured but still worth it

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Jeffrey Muench
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Hiking
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Katie Darrin
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Hiking
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Emma Rolfs
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Hiking

There were some highlights - the rock formations on east ridge were really interesting and fun to hike. However, on a Friday afternoon I was always within eye-shot of another hiker. Also, because it’s so close to Boulder, I could hear the highway noise throughout the whole hike.

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Tristan Brewer
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Hiking

Hard to run — easy to hike (Class 1 with rocky high grade, Class 2 for a few feet near the top). Lot to lot time was a hair above an hour; beautiful sunrise spot.

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Jonathan Pevarnek
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Hiking
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Drew Phillips
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Hiking
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Noel Henry Jr
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Hiking

hot

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Cagri Onder
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WalkingNo shadeRocky

Hard, rocky and steep one. Takes like 90 minutes total with average speed. Might be good for bouldering training as well.

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Monica S
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HikingGreat!RockyScramble

This is great if you're looking for a challenging hike that doesn't take all day. We took the dirt road on the way up which had some great views throughout. You can also take the steep route which is a little shorter, but you'll get a good leg day.

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Louis Fioravanti
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Hiking
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Betsy Rae
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HikingGreat!Rocky

great hike! we did the hike over Labor Day weekend. it was busy but not overly crowded. we did the hike late morning to early afternoon - it was very hot and smoky from the wild fires. I would definitely do this hike again! I would not recommend for dogs.

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Kajal Gaur
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HikingGreat!No shadeRockyScramble

This is a fun short but challenging hike. We did this on a weekend in the evening and it was pretty crowded. The last leg of the valley trail is a bit strenuous and requires a lot of scrambling over the rocks. Once you reach the top the sunset views are very rewarding and makes all the effort worth it. Coming down the Mt sanitas trail is easier as it’s less rocky. Highly recommend it!

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Casey Killingsworth
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HikingGreat!RockyScramble

Fun, nice views, heavily traveled. Would do again :). Not for children or elderly.

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David deCastro
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Hiking
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