How many miles and how much climbing is involved? How long does it take for (as Trek420 says) "mortals"? How many pieces of pumpkin pie do you think the ride will burn off? The stupid T-day calculator says I need to ride about 58 miles at 15mph, but I doubt Mt. Diablo is a 15mph ride...

I have an offer to go mountain biking on Friday. Hmmmm Decisions, decisions...