The Loop finally became an actual loop in January of this year, when Pima County finished the connection between Glenn Street and Tanque Verde Road, so now you can take a leisurely 53.9-mile ride and end up right back where you started. Counting the additional shared use paths and bike lanes that are considered part of the loop, there's more than 120 miles of the thing so far through Marana, Oro Valley, Tucson, South Tucson and unincorporated Pima County. So hop on wherever! The Loop is never far away.
Runners up:
2. Rillito River Path
3. Mount Lemmon
