Arthur's Rock to Howard Trail Loop is a 4.5 mile moderately trafficked loop trail located near Fort Collins, CO. The trail is rated as difficult. Dogs are also able to use this trail but must be kept on leash. 4.5 miles 1148 feet Loop dogs on leash Expand Map Sign up now to see this map! Reviews (0)Photos (0)Recordings (0)No one has reviewed this trail yet. Be the first!