Mount Fox is composed of sedimentary rock laid down during the Precambrian to Jurassic periods. Formed in shallow seas, this sedimentary rock was pushed east and over the top of younger rock during the Laramide orogeny.[6]
Climate
Based on the Köppen climate classification, Mount Fox is located in a subarctic climate with cold, snowy winters, and mild summers.[7] Temperatures can drop below −20 °C with wind chill factors below −30 °C. In terms of favorable weather, June through September are the best months to climb it.
^Gadd, Ben (2008), Geology of the Rocky Mountains and Columbias
^Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11: 1633–1644. ISSN1027-5606.