Glenn Campground Access is a hike-in/bike-in trailhead located 7 miles from a locked gate along Highway 39, providing access to 10 primitive campsites at 2,000 feet elevation in the San Gabriel Mountains.

The trail is a designated National Scenic Bikeway with stream water available (must be treated), vault toilets, picnic tables, and fire rings; an Adventure Pass is required for parking at the trailhead.

Physically challenged visitors may obtain a permit from the Glendora ranger office to drive to the campground, and the area offers native trout fishing with catch-and-keep regulations from the gate to the second bridge and catch-and-release upstream.