Originally Posted by valygrl

The best one I ever did was the Sierra Fall Classic out of Mammoth, CA. 100 miles of pure loop - no little extra out-and-back thingies to make it 100. Not one place on the entire loop that you could have gotten water on your own. Not even a door to knock on. Not one stop sign, let alone red light. Incredible views of the sierra - Ritter/Banner, the Minarets, Mammoth - plus Mono Lake and plenty of high-desert sage. Maybe 5 cars the whole day.

And it's pretty hard (maybe 8K' climbing), and pretty far away from any big cities, so the participants were mostly skilled riders, well prepared, easy to ride with, and friendly.