When we got back to the start, we were all comparing mileages, and for some reason, I was the only one with 60 miles ... everyone else had 65, and some had 70 or 80, depending on if they rode to the start. Well, after uploading my Garmin data, it appears that I inadvertently stopped my Garmin while we were waiting at Highland and Camino Tassajara. Doh! It didn't catch our aggressive ride to the finish. Damn! At least the mystery is solved.