Cow Creek trailhead is near the historic McGraw Ranch, at the end of McGraw Ranch Road, which can be found north of Estes Park off Devils Gulch Road (Limited parking). R off US34 on MacGregor Ave. 3.5 mi. then L on McGraw Ranch Rd. 2.5 mi. to end. Access to 12 backcountry sites along the northern boundary of the Park, and 2 closer in along the Cow Creek trail.