D Robertson:
Colorado River at Black Canyon
D Robertson:
Colorado River at Black Canyon
D Robertson:
Colorado River at Black Canyon
D Robertson:
Black Canyon
D Robertson:
Black Canyon
D Robertson:
Black Canyon
D Robertson:
Colorado River at Black Canyon
D Robertson:
Black Canyon
D Robertson:
Black Canyon
D Robertson:
Black Canyon
D Robertson:
Colorado River at Black Canyon
D Robertson:
Colorado River at Black Canyon
D Robertson:
Lake Mead
D Robertson:
Lake Mead