the valley of the sun with the city of phoenix viewed from usery mountain reginal park

activities arizona barrel blue bright cacti cactus catuses cave cholla city clouds county desert distant environment flora forest formations from geological geology hiking landscape layers maricopa mountain national nature ocotillo outdoors over park pass phoenix plants precambrian prickly reginal regional reserve rock rocks saguaro sates scarface seen semi semidesert shadow shrubs spectacular tonto trail trails united usery valley vascular viewed views vista wilderness wind with