Needles and Grenadiers explorer William S. Cooper climbed Mount Richthofen by himself in 1908 in what is presumed to be the first ascent in historic times by Americans of European descent. No sign of previous climbers were present at that time.[5]
Today, the mountain is typically climbed from Lake Agnes to the north, easily reachable from Cameron Pass. The mountain is a steep Class 3 climb that often requires travel on steep scree slopes that are not very stable.
Climate
According to the Köppen climate classification system, the mountain is located in an alpine subarctic climate zone with cold, snowy winters, and cool to warm summers.[6] Due to its altitude, it receives precipitation all year, as snow in winter, and as thunderstorms in summer, with a dry period in late spring.
^William M. Bueler (2000). Roof of the Rockies: a history of Colorado mountaineering. The Colorado Mountain Club Press. p. 94.
^Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11. ISSN1027-5606.