The Warner Route Trail access provides a wilderness permit-required entry point to Black Canyon of the Gunnison's inner canyon, descending 2,722 feet over 2. 75 miles to reach the Gunnison River with established campsites and a backcountry toilet.

This is the longest and most popular South Rim route, recommended for overnight trips, offering approximately 1 mile of river access and excellent camping and fishing opportunities in a wider section of the canyon.

A free wilderness permit is required and can be obtained at the South Rim Visitor Center; the trailhead parking area is located at High Point at the west end of South Rim Road.