Best Half-Day hike near Tucson? I'm headed to Tucson this weekend with my SO and we'd like to do an awesome half day hike.  Since we're spending Saturday morning at Katchner Caverns, we'll only have half a day to hike around.  We'd really appreciate any suggestions for a great must-do hike that 2 fit people can complete in an afternoon.  Which park should we go see if we only have time to see 1?  Should we skip the Caverns altogether and just spend all day hiking?

Also on our list: Mission San Xavier Del Bac and the Pima Air and Space Museum.

Thanks!