This photo of jeeps at Mirror Lake is hosted at the Salida Regional Library. Given the CJ-3B in the photo, but a lack of CJ-5s, this photo was likely taken around 1953 or 1954. The caption reads: “The Jeep Club at Mirror Lake during their tour of Cottonwood and Tincup Passes in Colorado. This image is from the Salida Museum Negatives Collection.”
https://salida.marmot.org/Archive/salida%3A1449/LargeImage
PHOTO CREDIT: Salida Regional Library, Salida, Colorado https://salida.marmot.org/Archive/salida%3A1449/LargeImage