Hidden high in the southern Arizona Mountains with its endless Sonoran Desert vistas, rich history, and authentic Wild West vibe, Colossal Cave Mountain Park is a destination for the adventurous at heart. Listed on the National Register of Historic Places the 2400 acre park and ranch feature: guided cave tours, hiking and biking trails, horseback riding, petting zoo, camping, special events, food & spirits And more …From its subterranean depths to its majestic high desert mountain summits, Colossal Cave Mountain Park is a gem of geological wonders. With Miles to Explore! Just 15 minutes Southeast of Tucson. Open daily, closed Thanksgiving & Christmas. Hours: 8 a.m. to 5 p.m. Rates: Adults, $16, children 5-12, $9; under 4 free. Military with ID, $14, Military Child with ID, $8.