25      ARIZONA HIGHWAY 77

            (north of Tucson, AZ)

            About 35 miles north of Tucson there is a northbound descent on highway 77.  It is posted "7% next 12 miles" but it is not a steady grade.  The 7% sections alternate with sections of mild grade.  Even so, heat can build up in brakes on such a grade so use caution.  It is a good two lane road with occasional climbing lanes and mild curves.