History of Sun Valley

Archaeological evidence indicates that as far back as 10,000 years ago, the Wood River Valley was home for Native American people. Not until the 1870s, when gold was discovered in the West, did the European settlers and prospectors begin to populate the valley in search of fortune.

By the early 1880s, Ketchum was not only a booming mining town, but it also was famous for its healing hot springs. The Guyer Hot Springs Resort, located on Warm Springs Road, was popular with people from around the country for its mineral waters, croquet, tennis, and fun. By the end of 1884, Ketchum boasted 13 saloons, four restaurants, two hotels, and all types of businesses necessary for a thriving town.

When Count Felix Schaffgosch arrived in the Valley on January 16, 1936, the once prosperous mining town of Ketchum had transformed into a sleepy little town with a year-round population of only 100 people. The mining boom had come to an end and Ketchum’s population had moved on, leaving only a few behind. The Count had been hired by Union Pacific Chairman Averell Harriman to scout the West for the finest spot on which to build a destination ski resort. Within three days of arriving in Ketchum, the Count wired Harriman: "Among the many attractive spots I have visited, this combines the more delightful features of any place I have seen in the United States, Switzerland, or Austria for a winter ski resort." In less than a year, the luxurious Sun Valley Resort was completed and the doors were open to international publicity. The Sun Valley /Ketchum area was on the map.

With the grand opening of Sun Valley, "America’s First Destination Ski Resort," celebrities flocked to the area to see America’s new grand dame of ski resorts. Ernest Hemingway fell in love with Sun Valley and eventually made it his home; he finished For Whom the Bell Tolls in Suite 206 of the Sun Valley Lodge. Clark Gable, Gary Cooper, Ingrid Bergman...they all came to play at the glamorous, new winter wonderland.

Evidence of Sun Valley’s star-studded history can be viewed at the Sun Valley Lodge; black and white photos of smiling stars with a Sun Valley backdrop line the walls. Other historical information about the Valley can be found at one of our three museums and at local libraries.

Location and Climate

Located in South Central Idaho, the Wood River Valley is located in Blaine County, at the edge of the Sawtooth and Challis National Forests; the majestic Sawtooth Wilderness is located immediately to the north. Almost surrounded by U.S. Forest Service and Bureau of Land Management lands, the Valley’s heart is the Big Wood River. Between the sagebrush and lava drylands to the south and the forested mountain ranges to the north, the valley has a mountain desert climate. With an average humidity of only 30%, and 15 inches of precipitation per year, the northern latitude creates long days, with 15 hours of sunshine in the summer. Dry, sunny summers and mild, sunny winters gave the resort community its well-deserved name. Average summer temperature is 78 degrees and average winter temperature is 23 degrees, with an annual snowfall of 150 inches.

The cities of Sun Valley and Ketchum are at an altitude of 5,750 feet and are dwarfed by the ski mountain, Baldy, at 9,150 feet. The river valley slopes down to the cities of Hailey and Bellevue at 5,300 feet. Four large lakes in the Stanley Basin to the north and two large reservoirs to the south offer recreational opportunities. Hundreds of streams and alpine lakes can be found in the mountains and valleys surrounding the towns.