Find parking near the corner of Serrano and EDH Blvd -- that's a challenge, the parking lot right there you may notice on satellite is gated and private. Maybe the Raley's parking lot is the best bet. Then walk down Serrano on the north side on the sidewalk for a bit until you come to a path meandering off to your left. This path eventually intersects with the dirt trail to Asbestos Ridge.

Alternately, there appears to be a way in from the opposite end at the end of Adam Court -- which is a neighborhood where parking might be frowned on so you might want to walk in from Harvard Way. Don't try to enter from Meadow Wood because that's a gated street.