Stanyan trailhead, pix 1 thru 5.
Lower Historic Trail: 6 thru 11.
This rough, unmarked trail leads from the lower Historic to the uppermost Interior Greenbelt trail mentioned above that winds from the west dead-end of Belgrave, pic 12.
From the lower Historic, now up to the road (west trailhead for the Fairy Gates Trail here), pix 13, 14.
Onto the East Ridge Trail (pic 15), then the Mystery Trail (16, 17, 18), to the summit (pic 19).
North Ridge Trail back down: 20, 21, 22.
From the foot of the North Ridge, along Medical Center Way’s pedestrian walkway next to the guardrail, enjoying the view down to the lower Historic and Edgewood Trails, pic 23.
Onto a shortcut stairway long used by yours truly that curves around a building (pic 24). Down to the parking lot where a long stairway descends to behind UCSF buildings and out to Parnassus (25 and 26: top and near the foot).
There’s also a short trail behind homes on Edgewood (27, 28, 29) that'll take you out to Edgewood Ave. and onto Farnsworth Lane.
Farnsworth Lane, 149 steps, down to Willard and just up from Parnassus: 30 thru 35.