1-4: Rock slide, just above Badger Rapid, May 5, 1971 Photo of a rock slide above Badger Rapid in Marble Canyon, seen by Aaron B. Ross on a Colorado River trip in May of 1971
5-6: 10-man rafts from Oregon, Pete Cameron, May 6, 1971 Photo of a rock slide above Badger Rapid in Marble Canyon, seen by Aaron B. Ross on a Colorado River trip in May of 1971
7-8: Vasey's Paradise; largest opening empty, May 6, 1971 Photo of a rock slide above Badger Rapid in Marble Canyon, seen by Aaron B. Ross on a Colorado River trip in May of 1971
9: Marble Canyon just below Vasey's, May 6, 1971 Photo of a rock slide above Badger Rapid in Marble Canyon, seen by Aaron B. Ross on a Colorado River trip in May of 1971
10: Stanton's Cave, just above Vasey's, May 6, 1971 Photo of two people in a raft on the Colorado River in the Grand Canyon, May, 1971.
11: Marble Canyon, May 7, 1971 Photo of two people in a raft on the Colorado River in the Grand Canyon, May, 1971.
12-16: Lower Marble [Canyon] above Nankoweap, May 7, 1971 Photo of Vasey's Paradise, an oasis area along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
17: On trail to pueblo granaries at Nankoweap; Art and Doris Halmgren[?], May 7, 1971 Photo of Vasey's Paradise, an oasis area along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
18: Drying out plant press at junction of Little Colorado River, May 7, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
19: Downstream, Marble Canyon, from trail to Pueblo granaries at Nankoweap, May 7, 1971 Photo of Stanton's Cave area along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
20: Downstream from above Nankoweap, May 7, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
21: Marble Canyon above Nankoweap, May 7, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
22: Lower end of Little Colorado River; pontoon on way to sample fish, May 7, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
23-24: Junction, Little Colorado River, May 7, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
25: Little Colorado River, May 7, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
26: Junction of Little Colorado River with pontoon at entrance above, May 7, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, visited by Aaron B. Ross on a Colorado River trip in May of 1971
27: Marble Canyon looking upstream from Little Colorado [river] , May 7, 1971 Photo of hikers on trail to ancient granaries at Nancoweap Canyon, Grand Canyon National Park, visited by Aaron B. Ross on a Colorado River trip in May of 1971
28: Upstream view of Marble Canyon above junction of Little Colorado, May 7, 1971 Photo of Aaron B. Ross party drying out plant presses at the mouth of Little Colorado River, during the river trip through Grand Canyon in May of 1971.
29-30: Chuar Butte; airplane accident, May 7, 1971 Photo of a view of the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
31: Lower Marble Canyon, May 7, 1971 Photo of a view of the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
32-33: View of South Rim just below Little Colorado [river], May 8, 1971 Photo of a scene at lower end of Little Colorado River, during the Aaron Belnap Ross river trip through Grand Canyon in May of 1971.
34: View of South Rim and Desert House [Desert View Watchtower] just below Little Colorado [river], May 8, 1971 Photo of the confluence of the Colorado and Little Colorado rivers near the upper end of the Grand Canyon, during the Aaron Belnap Ross river trip in May of 1971.
35-036: Grand Canyon below Lava Canyon, May 8, 1971 Photo of a scene at the junction of the Colorado and Little Colorado rivers during the Aaron Belnap Ross river trip through the Grand Canyon in the spring of 1971.
37: Abandoned old boat just above 75-mile rapid, May 8, 1971 Photo of the confluence of the Colorado and the Little Colorado rivers near the upper end of the Grand Canyon, during the Aaron Belnap Ross river trip in May of 1971.
38: Grand Canyon just above Hance Rapid, May 8, 1971 Photo of a scene at the confluence of the Colorado and Little Colorado rivers, during the Aaron Belnap Ross river trip through Grand Canyon in May of 1971.
39: Upstream from Hance Rapid; lunch, raining, May 8, 1971 Photo shows a view up Marble Canyon from near the confluence of the Colorado and Little Colorado rivers, during Aaron B. Ross's river trip of June 1965
40: Lunchtime at Hance Rapid, May 8, 1971 Photo of a view of the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
41: Lunch and warm up at Hance; raining, May 8, 1971 Photo of the area of an airplane crash along the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
42: Clear Creek at junction with Colorado River, May 8, 1971 Photo of the area of an airplane crash along the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
43: Up Clear Creek, May 8, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
44: Up Clear Cree; Brian and Ray, May 8, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
45-046: Up Clear Creek, May 8, 1971 Photo of a scene along the Colorado River in Marble Canyon, Arizona, near the mouth of the Little Colorado, visited by Aaron B. Ross on a Colorado River trip in May of 1971
47: Hiking up Clear Creek, May 8, 1971 Photo of a scene along the Colorado River, just below the confluence of the Little Colorado, during the Aaron Belnap Ross river trip through the Grand Canyon in the spring of 1971.
48: Campsite just above Clear Creek, May 8, 1971 Photo of a scene along the Colorado River below Lava Falls in the Grand Canyon, during the Aaron Belnap Ross river trip in May of 1971.
49: Campsite, Clear Creek, May 8, 1971 Photo of the Colorado River below Lava Canyon in the Grand Canyon, during the Aaron Belnap Ross river trip in May of 1971.
50: Campsite and view downstream from just above Clear Creek, May 8, 1971 Photo of two people checking out an abandoned boat just above 75-mile rapid on the Colorado River in Grand Canyon, Dr. Aaron Belnap Ross trip, May 8, 1971
51: Campsite just above Clear Creek, May 9, 1971 Photo of a scene along the Colorado River above Hance Rapids during the Aaron Belnap Ross river trip through the Grand Canyon in May of 1971.
52: Between Clear Creek and Phantom Ranch; early, May 9, 1971 Photo of a lunch stop above Hance Rapid along the Colorado River near the upper end of the Grand Canyon, during the Aaron Belnap Ross river trip in May of 1971.
53-54: Hitchhikers just below Clear Creek, May 9, 1971 Photo of a lunch stop at Hance Rapid along the Colorado River during the Aaron Belnap Ross river trip through the Grand Canyon in May of 1971.
55: Below Phantom [ranch] and above Bass, May 9, 1971 Photo of campers in the rain at Hance Rapid along the Colorado River near the upper end of the Grand Canyon, during the Aaron Belnap Ross river trip in May of 1971.
56-57: Between Phantom [ranch] and Bass, May 9, 1971 Photo of a scene along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, visited by Aaron Belnap Ross's party in May of 1971.
58: Bass cable[?], May 9, 1971 Photo of a scene along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, visited by Aaron Belnap Ross's party in May of 1971.
59: Bass asbestos mine ¾ mile up Hakatai Canyon, May 10, 1971 Photo of a scene along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, visited by Aaron Belnap Ross's party in May of 1971.
60: Housekeeping and Bass asbestos mine, May 10, 1971 Photo of a scene along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, visited by Aaron Belnap Ross's party in May of 1971.
61: Deepest hole at bass asbestos mine with bottle left by Park S[ervice?], Brian Gottfriedsen[?], May 10, 1971 Photo of a scene along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, visited by Aaron Belnap Ross's party in May of 1971.
62: Implements at Bass asbestos mine, May 10, 1971 Photo of a scene along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, visited by Aaron Belnap Ross's party in May of 1971.
63: Looking down Hakatai Canyon from Bass Mine, May 10, 1971 Photo of Aaron Belnap Ross's party camping along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, in May of 1971.
64-65: Tapeats Creek. Paul and John sampling fish, May 11, 1971 Photo of Aaron Belnap Ross's party camping along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, in May of 1971.
66: Tapeats Creek, May 11, 1971 Photo of a scene along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, visited by Aaron Belnap Ross's party in May of 1971.
67: Kanab Creek, May 11, 1971 Photo of Aaron Belnap Ross's party camping along Clear Creek, a side tributary to the Colorado River east of Bright Angel in the Grand Canyon, in May of 1971.
68: Up Kanab Creek approximately 1 mile, May 11, 1971 Photo of a scene along the Colorado River in the Grand Canyon, Arizona, between Clear Creek and Phantom Ranch, visited by Aaron Belnap Ross's party in May of 1971.visited by
69: Up Kanab Creek, May 11, 1971 Photo of the Aaron Belnap Ross's party meeting backpackers in the Grand Canyon near Clear Creek, May of 1971.
70: Up Kanab Creek ½ mile; seep, May 11, 1971 Photo of a scene along the Colorado River, between Phantom Ranch and Bass Camp, during the Aaron Belnap Ross river trip through the Grand Canyon in the spring of 1971.
71: Kanab Creek, May 11, 1971 Photo of a scene along the Colorado River, between Phantom Ranch and Bass Camp, during the Aaron Belnap Ross river trip through the Grand Canyon in the spring of 1971.
72: Orval Winkler Hansen, May 13, 1971 Photo of a scene along the Colorado River (perhaps near Bass camp and Shinumo Creek), during the Aaron Belnap Ross river trip through the Grand Canyon in May of 1971.
73: Havasu 1 mile upstream. Art and Doris Halmgren[?], May 13, 1971 Photo taken at the Bass asbestos mine west of Grand Canyon Village, visited by Aaron Belnap Ross in May of 1971.
74: Havasu 2 miles upstream, May 13, 1971 Photo taken at the Bass asbestos mine west of Grand Canyon Village, visited by Aaron Belnap Ross in May of 1971.
75: Havasu Creek, 2 miles up. memillis[?] cordialis, May 13, 1971 Photo taken at the Bass asbestos mine west of Grand Canyon Village, visited by Aaron Belnap Ross in May of 1971.
76: Havasu Creek 2 ½ miles up; moss at bottom and pool at crossing, May 13, 1971 Photo taken at the Bass asbestos mine west of Grand Canyon Village, visited by Aaron Belnap Ross in May of 1971.
77-80: Havasu Creek just above Beaver Falls, May 13, 1971 Photo of a view down Hakatai Canyon from the Bass asbestos mine in the Grand Canyon, seen during the Aaron Belnap Ross river trip in May of 1971.
81: Havasu Creek approx. 1 mile above Beaver Falls, May 13, 1971 Photo of two men wading inTapeats Creek in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
82083: Havasu Creek 1 to 2 miles above Beaver Falls, May 13, 1971 Photo of two men wading inTapeats Creek in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
84-85: Havasu Creek, 2 miles above Beaver Falls. J-[?] Grass and maidenhair fern, May 13, 1971 Photo of Tapeats Creek north of the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
86-88: Havasu Creek 2 ½ miles above Beaver Falls, May 13, 1971 Photo of Kanab Creek north of the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
89: Havasu Creek just above Beaver Falls, May 13, 1971 Photo of Kanab Creek north of the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
90-92: On trail just above and over Beaver Falls, May 13, 1971 Photo of Kanab Creek north of the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
93-95: Havasu Creek at junction with Colorado River, May 13, 1971 Photo of Kanab Creek north of the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
96: Campsite Mile 158 ½ just below Havasu Creek, May 14, 1971 Photo of Cataract (or Havasu) Creek above Beaver Falls in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
97: Looking downstream Mile 158 ½, May 14, 1971 Photo of Cataract (or Havasu) Creek two miles above the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
98: Mile 158 ½ just below Havasu Creek, May 14, 1971 Photo of Cataract (or Havasu) Creek two miles above the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
99: Campsite Mile 158 ½ just below Havasu Creek, A.M., May 14, 1971 Photo of Cataract (or Havasu) Creek two miles above the Colorado River in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
100: Mile 158 ½ just below Havasu, early A.M., May 14, 1971 Photo of Cataract (or Havasu) Creek above Beaver Falls in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
101: Downstream Mile 158 ½, May 14, 1971 Photo of Cataract (or Havasu) Creek above Beaver Falls in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
102: Looking downstream Mile 158 ½, May 14, 1971 Photo of Cataract (or Havasu) Creek above Beaver Falls in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
103: Looking upstream Mile 158 ½, May 14, 1971 Photo of Cataract (or Havasu) Creek above Beaver Falls in the Grand Canyon, during a river trip by Aaron B. Ross in May of 1971
