Nearly covered by leaves - there was quite a bit of water and, underneath the leaves, it looked quite clear - certainly used by the cows. Note that in on the USGS Maps this canyon does not have a name - in the Cowgill and Glendening guide this is called Edgar Canyon (which is one drainage south on the USGS Maps).
Tags: araster spring,araster spring canyon,arizona,butterfly roadless area roadless area,coronado national forest,edgar canyon,peck basin,pima county,santa catalina mountains,santa catalina ranger district