Take I-5 north to the 14 North. Exit Ave. S and go left to the stop sign. Make another left and park at the bridge. Good place to start. You can get an area map at any gas station around there that will have street maps. Generally any road that crosses the duct has an access point. It starts up by Quail lake and goes all the way to Silverwood. You can fish the stretches from Quail lake to Pearblossom. Or the last stretch before it goes underground before Silverwood.