The Western Federation of Miners (WFM) was a labor union that gained a reputation for militancy in the mines of the western United States and British Columbia. Its efforts to organize both hard rock miners and smelter workers brought it into sharp conflicts – and often pitched battles – with both employers and governmental authorities. One of the most dramatic of these struggles occurred in the Cripple Creek district of Colorado in 1903–1904; the conflicts were thus dubbed the Colorado Labor Wars. The WFM also played a key role in the founding of the Industrial Workers of the World in 1905 but left that organization several years later.

Cripple Creek is a statutory city that is the county seat of Teller County, Colorado, United States. The city population was 1,155 at the 2020 United States Census. Cripple Creek is a former gold mining camp located 20 miles (32 km) southwest of Colorado Springs near the base of Pikes Peak. The Cripple Creek Historic District, which received National Historic Landmark status in 1961, includes part or all of the city and the surrounding area. The city is now a part of the Colorado Springs, CO Metropolitan Statistical Area and the Front Range Urban Corridor.