woman hiking under bright sun through the semi desert landscape of usery mountain regional park

activities arizona barrel blue bright 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 regional reserve rock rocks saguaro saguaru sates scarface semi semidesert shadow shrubs spectacular such through tonto trail trails under united usery valley varieites vascular views vista wilderness wind with woman