CWD testing for deer (bucks and does) is mandatory and free for all rifle season hunters who have harvested in specific hunt codes in the following GMUs: 11, 12, 13, 18, 22, 23, 24, 27, 28, 37, 48, 50, 56, 59, 103, 104, 105, 106, 107, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122,123, 124, 125, 126, 127, 129, 130, 131, 132, 139, 145, 146, 181, 211, 231, 371, 481, 500, 501, 511, 512, 561 and 591.
The hunt codes selected for mandatory testing are shaded green in the 2024 Colorado Big Game Brochure, starting on page 22.