 To continue on the Gabrielino Trail, travel west to the head of the West Fork at Red Box Saddle near Mount Wilson.This is the trail's highest point.From Red Box, the Gabrielino continues westward down the Arroyo Seco through Commodore Switzer Trail Camp, Oakwilde and Gould Mesa Campgrounds, and emerges from The Arroyo at the Jet Propulsion Laboratory.