Sourdough Trailhead


Photo of Sourdough Trailhead sign and trail

The Sourdough Trailhead is the main trailhead for the Sourdough Trail #835 and is the trails southernmost access point.

At a Glance

Permit Info: No permits are required at this time.
Usage: Light
Restrictions: Motorized vehicles are prohibited.
Closest Towns: Nederland and Ward, Colorado
Water: None
Restroom: Vault toilets
Operated By: U.S. Forest Service
Information Center: Boulder Ranger District, 2140 Yarmouth Ave, Boulder, CO 80301, Phone 303-541-2500, Fax 303-541-2515; Contact Us

General Information

Directions: From Nederland, travel seven miles north on Colorado Highway 72. Turn west onto gravel National Forest System Road 298, signed as the turnoff for the University of Colorado Mountain Research Station. A parking area is not far on the left.

Recreation Map

Map showing recreational areas. Map Information



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Horse Riding & Camping

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Winter Sports

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XC Skiing/Snowshoeing

From Sourdough Trailhead, the Sourdough Trail and Rainbow Lakes Road are both popular ski or snowshoe treks. The Sourdough Trail heads north, climbing over the shoulder of Niwot Ridge to Brainard Lake Road and beyond. Rainbow Lakes Road heads west for 4.5 miles to Rainbow Lakes Campground. Beyond the campground, the Rainbow Lakes Trail and Glacier Rim Trail head into the Indian Peaks Wilderness.
Warming Sheltersnone
Areas & Activities

Campgrounds At-A-Glance


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