More than 20 miles of hiking trails wind through the park, past natural bridges, startling rock formations, and evidence of the ancient volcanic eruptions that produced the bizarre rock formations of Chiricahua. Dogs are permitted in the campground and picnic areas but are not allowed on the wilderness trails. Trails range in difficulty and length, some a mere 1/4 mile, others as much as 9 miles roundtrip. The park provides a hiking brochure with details and guidelines for these hikes, available at the visitor center. There is a $5 per person fee to enter the Monument.