This December 4, 1938 Idaho Statesman published a Sun Valley promotional article written by the resort’s manager which discussed Ski Mountaineering opportunities in the mountains surrounding the resort. The article predates the publishing of Andy Henning’s definitive guidebook for backcountry skiing around the resort, the Sun Valley Ski Guide, in 1948. As lift skiing gained popularity and adherents, the resort abandoned Pioneer Cabin and terminated its backcountry guiding.