The Sourdough Trailhead is the main trailhead for the Sourdough Trail #835 and is the trails southernmost access point.
At a Glance
No permits are required at this time.
Motorized vehicles are prohibited.
Nederland and Ward, Colorado
U.S. Forest Service
Boulder Ranger District, 2140 Yarmouth Ave, Boulder, CO 80301, Phone 303-541-2500, Fax 303-541-2515; Contact Us
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.
This trailhead at the south end of the Sourdough Trail offers ample parking and turnaround space. Sourdough Trail is a longer-distance trail excellent for a day-outing.
Occasional lakes and streams.
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.