Last time I was there, I parked near the East end of the Traverse Mountain subdivisions and jogged across the flats to the East. An ATV / jeep trail follows EN along the rolling ridgeline, eventually merging onto the lower Jacob's (check Google satellite for a more up-to-date trail layout). The motorized guys access these parts - once in a while - from Alpine. I hope you can forgive me for not giving better driving directions :)
Be sure to stay to the Southern Spur Ridge when the trail splits about two or three hundred feet up the road from the parking area. I made the mistake of proceeding up the Northern Ridge, which ascends much faster than the southern, and ended up in some thick scrub oak. I then had to bushwhack over to the correct trail.