You can go straight to this cache; alternatively the River Trail is a 38 mile hard surface which can be explored as part of a 61 mile loop including the Shoreline Bikeway and you can access the trail at one of these entry points:
* Parking lot near the ranger station at the entrance to San Gabriel Canyon (a.k.a. Azusa Canyon).
* Angeles National Forest end of trail Entry & Parking at about 1900 N San Gabriel Canyon Road trail has been extended about 1 mile north to elevation 825 feet above MSL
* Dunlap Crossing Road in West Whittier (No Parking Lot)
* Santa Fe Dam entry east of face of dam Parking in Dam area
* Foothill San Gabriel river crossing Entry & Parking just north of Foothill next to river also rest rooms
* Pacific Electric Bridge at about 741 Encanto Parkway Parking at Encanto Park, Durate
* El Dorado Park, Long Beach - Enter park on Spring St. between I605 and the river. Plenty of parking and poopyrooms.
From Wikipedia, the free encyclopedia. Further information about the River Trail can be found on wikipedia here.