Black Hole Trail is a 6.8 mile out and back trail located near Alma Parish, New Brunswick, Canada and is good for all skill levels. The trail is primarily used for hiking and is accessible from April until October. 6.8 miles 700 feet Out & Back kid friendly hiking Expand Map VIEW FULL MAP Sign up now to see this map! Reviews (0)Photos (0)Recordings (0)No one has reviewed this trail yet. Be the first!