Yep, this is the one and I do have a 2007 photo of this trailhead up on Webshots. There are a few steps at the foot and now there’s a marker partway up. This is the now called the West Ridge Trail. It’s steep and a beauty. After this first trail marker it continues up. This upper part I’d ascended much more recently; you’ll squeeze by some big rocks. At the top of this the summit is very close.
On the way up the Oakhurst steps from Warren (second pic), upon reaching the dead-end of Oak Park partway up, could see and hear construction still ongoing nearby. Was something recently demolished here and a new home now being built? Don’t remember what was here before. Better just one new home than a bunch of ‘em though. Don’t be messin’ with our mountains, developers.
Hot today to be doing this. Took the East Ridge Trail down from the summit, then continuing to descend from Medical Center Way (first via the Fairy Gates Trail: third pic), continued on the lower Historic Trail out to Stanyan.