My home trail is White Ranch. All sorts of variations can be done from the east parking lot and you’ve always got the difficult sandy rock garden at the start.
Here’s what I usually end up doing:
Up Belcher, down Mustang, Maverick, Longhorn, Whippletree back to the bottom of Belcher.
I recently used White Ranch to access Golden Gate State Park and let me tell you, that was a KILLER loop. 45 miles and 9,500 vertical feet. The stats don’t give it justice because the technical trail for most of those miles is arduous and relatively slow going.