clouds descending into the grand canyon.

mountain landscape rock cloud wilderness geology valley sky nature hill terrain ridge snow summit cliff clouds descending grand canyon morning shower skies cleared cloulds descended rim national park kaibab forest canyon–parashant monument hualapai indian reservation havasupai reservation navajo nation baaj nwaavjo #39aph39#tah kukveni ancestral footprints monument president theodore roosevelt preservation scenery geological history colorado river tributaries channels layer uplifted aspects geologists time down-cutting retreat cliffs widening canyon inhabited native americans settlements caves pueblo site pilgrimages tourism tourists vacation hiking tour