Tucson Area Info

Pima Trails Association
Santa Catalina Ranger District
Andy Flach's Tucson Hikes
Arizona Sonora Desert Museum
Arizona Poison Page (for those biting critters on the trail)

Register a stolen bike or check if one's stolen

Stolen Bicycle Registry (free service)

Mountain Biking Organizations

Sonoran Desert Mountain Bicyclists
SAMBA (Southern Arizona Mountain Bike Association)

Mail Order Bike Equipment & Supplies

Nashbar
Performance Bicycle Online
REI

Arizona

Arizona Highways
Mountain Biking in Arizona

Southwest

GORP Guide

Trails in General

TOPO.INFO
TRAILSOURCE.COM