Muddy Fork Lava Bed Trail is a 5 mile out and back trail located near Toppenish, WA and is rated as moderate. The trail is primarily used for hiking and is accessible from June until October. 5.0 miles 500 feet Out & Back hiking 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!