Get someone to drop you off at the top near the fire station in the fall or spring. Bring plenty of water in case you get slightly lost (like one of our idiot writers did). You'll plunge several miles down through various vegetation zones, from cool pines up top all the way down into the stinking-hot desert. The rough and rocky road will shake the bejeezus out of you. It's a blast--at least until you accidentally hit the front brake first or jam into a crevice wrong, and then BLAM! Over the handlebars you go. It's not a real mountain-bike ride unless you draw blood. After the ride, you'll end up in San Manuel, where hopefully your ride is waiting with a cold beer or two.