Taos NM would be a great place too, although I'm partial to Gunnison.
Here are a LOAD of rides out of Taos, courtesy of (STOC) a group of us that meet every year. Maps are uploaded in individual PDF's and one big Garmin Mapsource file.
Ride 1: The Enchanted Circle - 80 miles.
Ride 2: Los CaƱones Grandes y Pueblos Viejos (Big Canyons and Old Towns) - 111 miles
Ride 3: The Enchanted Figure-Eight - 190 miles
Ride 4: The West Loop - 272 miles
Ride 5: The East Loop - 295 miles
Ride 7; Oceans, Fire, and Ice: A Geology Field Trip - 310 miles
Ride 9: Los Cojones Grandes - 551 miles