Not sure, but you take I5 pass Magic Mountain about 30 miles exit Smokey Bear Road. You will see sign to Hungry Valley State Vehicular Recreation Area. We are leaving Arcadia around 10am take a hour to get to entrance.
We just got back to LA, Hungry Valley trails was tons of fun. We did most of the blue & green trail. Ran into a group of 3 very modded T4R's and 1 FJ, they went up to do the black trails. Will post pics when I get back to N Cal.