the semi desert landscape of usery mountain reginal park with many saguaru, cholla and barrel cacti

activities arizona barrel blue cacti cactus cactusn catus catuses cave cholla clouds county desert environment flora forest formations geological geology hiking landscape layers many maricopa mountain national nature near ocotillo outdoors park pass pencil phoenix plants precambrian prickly reginal reserve rock rocks saguaro saguaru sates scarface semi semidesert shadow shrubs spectacular such tonto trail trails united usery valley varieites vascular views vista wilderness wind with