Google tells me "Late holocene slip rate and earthquake history for the northern Calaveras fault at Welch Creek, eastern San Francisco Bay area, California". Oh wait, next page has bicycling stuff. Let's see: "About a 4 mile climb with 3 hard sections starting at midpoint. Hardest stretch is around mile 1.7 with averages around 16% for about 1/2 mile. End of Welch Creek - Congrats! Make a u-turn here. This is not a safe descent so take your time and keep it slow." Oh, sounds delightful. . But I think I'll join you guys anyway.