Here is a basic map to Inland Fish and Game
Take the I-10 Freeway to the 210 Freeway North (formerly the 30) and exit at 5th Street. Go East (right) to the traffic signal at Boulder.
Make a right turn on Boulder and drive South about 1/4 mile. The entrance is on the East Side of the road. (should be on your left)
You may also come out from West on the 210 freeway. Get off at 5th and follow the above directions from there.
Remember the 30 has been renamed the 210!