The Rillito River Trail is a safe and scenic way to zip through a sizable stretch of the city without confronting the traffic and exhaust common to urban bicycle-riding. The path is 12 miles of pothole-free biking enjoyment that winds through groves of mesquite trees and under overpasses—and thanks to Tucson's dedicated cycling community, it's now linked to a network of other trails that offer access to nearly any part of the city. The trail also veers close to a variety of areas with shops, restaurants and other businesses that offer just about anything a rider could need on a two-wheeled urban adventure.
Runners up:
2. Mount Lemmon
3. Fantasy Island