Generally agreed to be the most difficult river crossing on the trail. The Twitya is 200 feet wide and cannot be forded. You must use a raft or swim across. Since the road crosses at the narrowest portion of the river, it is recommended that hikers proceed to a braided section two miles upriver to attempt their crossing. If you cross at that point, you can reward yourself with a dip in Lymnaea Springs, about one mile northwest of the road crossing point.