Glenwood Springs, Colorado Pool. Glenwood Springs was originally known as Defiance Colorado. Defiance, Colorado was established in 1883, a camp of tents, saloons and brothels with an increasing amount of cabins and lodging establishments. It was populated with the expected crowd of gamblers, gunslingers, and prostitutes. Town Founder Isaac Cooper's wife Sarah was having a hard time adjusting to the frontier life and in an attempt to make her environment somewhat more comfortable, persuaded the founders to change the name to Glenwood Springs, Colorado after her beloved hometown of Glenwood, Iowa. Photo by Carol Highsmith.