Early settlers were drawn to the Evergreen area for its unsurpassed beauty and natural resources. Ranching and lumber were the initial basis for Evergreen's economy in the 1800s, and wealthy summer residents built prestigious second homes there. By 1920, Evergreen became a tourist mecca through development of the Denver Mountain Parks system and famed hotels, resorts, and dude ranches. From 1920 to 1942, Evergreen was the epicenter of outdoor recreation in Colorado. After World War II, a unique array of volunteer arts, nature, and charity organizations was created by Evergreen's people. A bohemian era in the 1960s and 1970s brought artists, musicians, and hippies, including Willie Nelson, to Evergreen. Explosive growth after completion of Interstate 70 led to development of new festivals and attractions, including the magnificent parks of the Jefferson County Open Space system. Evergreen still retains an atmosphere of the legendary Old West, from its boardwalk along Main Street to its annual Evergreen Rodeo and Rodeo Parade to its surviving area ranches.