Starting in Acton, headed down Soledad Canyon to Indian Canyon and up to Santa Clara Divide (3N17), then over Mt. Gleason to Mill Creek Summit. From there, continuing on 3N17 over Mt. Pacifico to Angeles Crest, and down past Newcomb's Ranch to Chilao, then circled back to Mill Creek Summit. From there, down Angeles Forest to Aliso Canyon to return to Acton. Late start and longest mountain bike ride to date. Reached Mt. Pacifico and the descent near the end of twilight, and stopped to put on a headlight and taillight; fog came in and the temperature dropped almost to 40 degrees F. Plenty cold for the descent with nothing but a Tyvek envelope to keep warm. Fortunately, the temperature climbed about 15 degrees by the time I made it back to Acton. Dinner at Wence's Bistro, and warmed up over a big bowl of wonton soup. Tired afterwards...