The Saguaro National Park Labor Day 8-Miler & 5K is a long-running iconic Tucson event. The race features a paved 8-mile loop to challenge you as you race among the rolling hills of the Saguaro Cactus Forest in the foothills of the Rincon Mountains. The 5k Fun Run and Walk is an easier out-and-back, with the same gorgeous scenery  Old-timers will remember when this race was the Saguaro National Monument Run and part of the National Park Service, an American treasure celebrating over 100 years of continuous service. This race is one of the few races produced on National Park lands.