This map shows the trails within Eaton Canyon. All are open to foot traffic, but bicycles are permitted only on the Mt. Wilson Toll Road, which is accessible from the Pinecrest entrance near the bridge. To get to the Pinecrest gate, go north on Altadena Drive one mile past the entrance to Eaton Canyon. Turn right on Crescent, then right again on Pinecrest. Observe parking signs carefully.
Click the names on the map for a detailed description.
The internet has a number of excellent hiking guides that cover the San Gabriel Valley.
One excellent reference written by Dan Simpson can be accessed here
Here is his guide to the "Hike to the falls"