Yep, listen to Loll - do the "loop" clockwise, ending at Black Mtn, not counter-clockwise starting there. For the best single-track, go FO-SC road, up Table Mtn (the one that is "uphill only" for bikes), then left on SG trail to the start (9 & Skyline), turn around and head back SG trail past where you came up, cross the road into LR, then take LR road to LR trail, then north onto the Bay Area Ridge Trail, and take that to Skyline Ridge. Head through that to the parking lots past the Xmas tree farm. You have lots of options depending on how tired you get - cross the road and head down back to SC, cross the road and head up to Black Mtn (various ways), continue through Skyline ridge (steep!) to Russian, skip the steep fireroads and take the road to Russian, then plenty of options there.
Or, if you need your head examined, you could continue all the way through Russian, head north on Skyline to Skeggs, ride some in Skeggs, head north to Purissima, bomb down to the ocean and then head back south and back up Alpine, then down back into Montebello and SC. I ran out of daylight last spring doing that. Too much road, if you have that kind of energy go to Coe!