Before you go, check out ADOT bike laws, but keep in mind that city ordinances may also apply.
- Maricopa County Bike Route Map - http://geo.azmag.gov/maps/bikemap/
- Tempe Bicycle Action Group (Awesomely acronymed T.B.A.G.) weekly rides and routes - http://www.biketempe.org/routes-weekly-rides/
- Papago Park trail maps for mountain biking - http://phoenix.gov/parks/trails/locations/papago/trails/index.html
- Scottsdale Greenbelt interactive Google map (great for cruising and exercise riding) - Google Maps
more to come...