The only access to the cave system is by walking a strenuous 1 1/2-mile-paved trail, which rises 1,092 ft to an elevation of 6,730 feet above sea level. The round-trip hike and tour of the cave system takes about three hours. Mid-summer temperatures on the trail can reach 100 degrees F. However, temperatures in the caves average 45 degrees, so a sweater or light jacket is recommended. Hiking shoes, water, flashlights and sunscreen will make your visit safe and enjoyable.