I had heard and read about Mt Lemmon, a popular destination for cyclists, so we headed out to check it out. Mt Lemmon is part of the Santa Catalina Mountain range and rises over 9000' above sea level and 6000' above the valley floor. Temperature change is 25-30 degrees so in the summer, it is a must ride to escape the desert heat. At the base of the mountain, Saguaro cactus are plentiful but soon they fade from view.
The distance to the top, which I think is Summerhaven, a town that was virtually wiped out in a 2003 fire is 26 miles so the climbing, while constant, is not steep, but the views are great. At the top, they receive 12-15' of snow during the winter.
Team Radioshack trained out here in 2009 and during our drive up the mountain, I counted over 30 cyclists, on a Friday afternoon.
Tucson pops up on cycling friendly lists for good reason. Every street or road I saw had designated cycling lanes and the place is crawling with cyclists and bike shops. Kenda Dave trained out here one year and gave the area a thumb's up for cycling.