The Gabrielino Trail is a United States National Recreation Trail that runs through the Angeles National Forest in Los Angeles County, California. Its western trailhead is near the NASA Jet Propulsion Laboratory in Altadena, California, and it runs generally east/west, with its eastern terminus at Chantry Flats, just north of Arcadia, California. It passes through three major watersheds and has an elevation gain/loss of 5-6,000' depending on the direction.  It consists almost entirely of singletrack trail in the wilderness areas to the West, North, and East of Mt. Wilson.