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Mount Sanitas Loop

 4.1 (66)
Trail Mapped Wrong?

Length

3.2 Miles 5.2 Kilometers


Elevation

1,281' 390 m

Ascent

-1,280' -390 m

Descent

15%

Avg Grade (9°)

43%

Max Grade (23°)

6,780' 2,067 m

High

5,521' 1,683 m

Low

Conditions


All Clear 25 days ago
Dry History

Getting forecast...

Very popular and scenic loop right from the edge of town.

Nick Wilder

Overview [Suggest Changes]

This is a steep but rewarding trail, with great summit views of the foothils to the high peaks, and all of Boulder. It is virtually always crowded with all kinds of runners, hikers, and dogs.
Features: Views [Add/Remove]
Dogs: Off-leash

Need to Know [Suggest Changes]

In typical Boulder fashion, there are some crazy speed records on the various trails.

Description [Suggest Changes]

From the beginning of the Sanitas Valley Trail, take your first left on the Mount Sanitas Trail and immediately start the very steep ascent of the mountain. The trail is mostly shaded, but there are tons of high steps, both on logs and boulders, which make the trail tiring. You'll pass some large rock outcroppings that are popular with climbers and boulderers and several nice places to rest and enjoy the views both east and west.

After several false summits, you finally gain the true summit and have unobstructed views of all of Boulder to the east, and partially obstructed views of foothills and Indian Peaks to the west.

Head down the very steep East Ridge Trail, which has several tricky sections of steep rock. It eases up as you descend, and finally widens and becomes much easier as you get to a saddle and intersection with the Sanitas Valley Trail.

As you descend this nice, easy gravel road, enjoy the spectacular views of the Flatirons, seen from a unique side-on angle. You'll pass the historic Silver Lake ditch (which supplies water to Boulder farmers and has been in use since the late 1800's) and soon end back where you started.

Flora & Fauna [Suggest Changes]

Mountain lions are common in the area, and the trail is occasionally closed if there is a fresh kill. You'd be lucky to see one though!

History & Background [Suggest Changes]

The peak is named for the Boulder Sanitarium that sat at the current site of the Boulder Community Hospital. The building was completed in 1896 and was primarily used to treat tuberculosis patients. The original smokestack still stands.

There is also an old quarry halfway up the slope (a spur trail will lead you there) that was used for several early University of Colorado buildings.

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Your Check-Ins

Check-Ins

Jun 11, 2018
Jessica Zacarias
Jun 11, 2018
Kristi Maulding
Jun 11, 2018
Sasu ZK
Coming down was fine. Made me sad to see all the people coming UP from the parking lot
Jun 7, 2018
Kyle Nieukirk
3.2mi
Jun 6, 2018
Sean Cabaniss
Jun 2, 2018
Lindsey R
Jun 2, 2018
Greg Amato
3.2mi
Jun 1, 2018
Lindsey R

Trail Ratings

  4.1 from 66 votes

#32

Overall
  4.1 from 66 votes
5 Star
32%
4 Star
50%
3 Star
17%
2 Star
2%
1 Star
0%
Rankings

#11

in Colorado

#32

Overall
629 Views Last Month
7,467 Since Nov 15, 2014
Intermediate/Difficult Intermediate/Difficult

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