This is a popular bike ride on the west side of Tucson, Arizona. You pass Old Tucson and the Desert Museum along the ride.
There are some great views at the top of Gates Pass. Stop and take a look to the east and to the west.
The ride has a little of everything: flats, rollers and a short killer climb up the back side of Gates Pass.
To add mileage you can do McCain Loop several times or in reverse to add variety.
Pictures below back side of Gates Pass