Greenback Cutthroat Species Distribution

Greenbacks are native to the Arkansas and South Platte River basins in Colorado's Front Range mountains, and a few South Platte tributaries in extreme southeastern Wyoming. It was listed as endangered in 1973 but downlisted to threatened when a recovery plan began in 1978. The Greenback Cutthroat Trout's maximum size is 18 inches, and it has the largest spots of all cutthroats. Despite its name, the Greenback Cutthroat's back is not particularly green.