Add to ORKGPhoto of Alvin bridging over a pool in Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's July 1962 river trip
Photo of Alex, Alvin, and Davy in Hidden Passage off the Colorado River in Glen Canyon, taken during...
Photo of Mystery Canyon off the Colorado River in Glen Canyon, taken during Alvin Colville's July 19...
Photo of Davy in Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's...
Photo of Alvin bridging over a pool in Hidden Passage off the Colorado River in Glen Canyon, taken d...
Photo of Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's July 19...
Photo of Alex and Alvin in a pool in Hidden Passage off the Colorado River in Glen Canyon, taken dur...
Photo of crew in Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's...
Photo of the entrance to Hidden Passage in Glen Canyon on the Colorado River, taken during Alvin Col...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of Alex, Alvin, and Davy in Hidden Passage off the Colorado River in Glen Canyon, taken during...
Photo of Mystery Canyon off the Colorado River in Glen Canyon, taken during Alvin Colville's July 19...
Photo of Davy in Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's...
Photo of Alvin bridging over a pool in Hidden Passage off the Colorado River in Glen Canyon, taken d...
Photo of Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's July 19...
Photo of Alex and Alvin in a pool in Hidden Passage off the Colorado River in Glen Canyon, taken dur...
Photo of crew in Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's...
Photo of the entrance to Hidden Passage in Glen Canyon on the Colorado River, taken during Alvin Col...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of the Colorado River below Hidden Passage in Glen Canyon, taken by Alvin Colville during a Ju...
Photo of Alex, Alvin, and Davy in Hidden Passage off the Colorado River in Glen Canyon, taken during...
Photo of Mystery Canyon off the Colorado River in Glen Canyon, taken during Alvin Colville's July 19...
Photo of Davy in Hidden Passage off the Colorado River in Glen Canyon, taken during Alvin Colville's...