High Rock River Trail access is located in Humboldt Redwoods State Park, accessible via a small gravel parking area off Avenue of the Giants (at mile 22. 8). The trailhead offers a scenic 1.

3-mile forested walk through old-growth redwoods with views of the Eel River from High Rock overlook; parking is typically uncrowded and the trail is easy to moderate with minimal elevation gain (150 feet).