Unit 21 in Colorado offers various hunting opportunities, though recent conditions have posed significant challenges. Winter 2017-2018 was notably dry, impacting antler growth, while the area has seen increasing hunting pressure and droughts that make some consider it less desirable for deer, though third-season hunters may encounter migrating herds. For elk, the terrain is rugged with sparse water sources, and despite potential access issues due to oil wells and roads, some hunters find success away from main roads. Given these factors, it's crucial to thoroughly research, be prepared for limited access to water, and possibly consider alternative units with similar or better draw odds and game conditions.