Well, we can all do it again some other time. It's a nice ride.

Maybe we'll save the added loop up Felter & down Sierra for when our hill-climbing demon friends can join us

I've uploaded the two routes on to Bikely, starting from the Niles staging area, if you'd like to take a gander:

The shorter version with just Calaveras is about 40 miles. Tack on 15 flat miles if starting from my home. Bikely says the elevation gain is about 2100 ft, we'll see how close that is - click on Elevation to see the profile.
http://www.bikely.com/maps/bike-path...iles-clockwise

The loop with Felter & Sierra added on is about 50 miles (about 65 from my home) with an est'd elevation gain of about 3300 ft.
http://www.bikely.com/maps/bike-path...ise-from-Niles