I believe this old shelter is mentioned in the Cowgill and Glendening guide - although I think it may be in different condition now... it had an old barbed wire fence around and the fence line went up the hill. On the way back I didn't see this shelter - I was not looking hard and took a different route, but I think it is a little harder to see than the picture shows...
Tags: arizona,butterfly roadless area roadless area,coronado national forest,pima county,santa catalina mountains,santa catalina ranger district,shelter,south fork of edgar canyon