The original caption for this stereo photograph was incorrect. It was originally "Canyon of Lodore, near lower end" Green River... Moffat County, Colorado. June 27, 1871. (USGS Earth Science Photographic Archive digital file: hjk00649).

Bruce R. Julian (USGS), however, has identified the location as Warm Springs rapid on the Yampa River. Hillers and others did go on frequent scouting mission throughout the voyage. Bruce wrote:

"This picture is particularly important because it was the site of a major (~1000 year) flash flood/debris flow on June 10, 1965. I know because I was there, and was nearly killed. (The next day a professional boatman WAS killed by the rapid.)"