On August 26, 1920, a caravan of Washington officials, automobile enthusiasts, park supporters, and reporters departed Denver for the first stop on the National Park-to-Park Highway, Rocky Mountain National Park.
Nearly three months later, the caravan returned to Denver having completed a 5,000-mile pilgrimage along the longest auto tour route to date, through the twelve national parks of the American West. The roads and automobiles left much to be desired; most roads were not paved. The tour suffered accidents and illness, but grew in numbers along the way as newspapers coast-to-coast covered the trek. By its close, the dedication tour had secured the idea of auto tourism of America's western parks in the national mindset.