Right on Mandeville Canyon Rd. This road should be extremely short and end in a wooden gate across the road.
Parking is also a bit of a problem.
Parking is restricted during practical riding hours for about a block away. Beyond this parking is allowed. The reason for this restriction is that neighbors complained of unruly Mtn. The trail is quite literally an access road for the Ca. Gas Co. It gets overgrown, and washed by the rains that in a year or so after being rebuilt, it turns into a practical single track.