Green Valley Trailhead is a challenging 2. 25-mile access point to the North Fork of the American River with a steep 2,240-foot elevation loss, requiring good physical fitness.

The trailhead is accessed via a rocky dirt road (high-clearance vehicle recommended) near Sugar Pine Reservoir, with restrooms available but no potable water on-site.

The trail is lightly used and not maintained by the Forest Service beyond the initial section, making it suitable primarily for experienced hikers seeking remote river access.