Looks like the Ute's gave up about 1/6 of the Western slope of Colorado for a few tags. See below.
http://www.fishingrssfeeds.com/node/6327
In 1874, Congress approved an agreement between the United States and certain Ute Indians in Colorado, known as the "Brunot Agreement". Under this agreement, the Utes ceded certain land to the United States but reserved a right to hunt on those lands for "so long as the game lasts and the Indians are at peace with the white people." The Brunot Agreement covers land now known as the Brunot Area, which roughly extends from U.S. Highway 160 on the south to the southern boundaries of Montrose and Gunnison counties on the north and from the middle of Mineral County on the east to just west of Cortez on the west.
Since 1972, the Tribe has refrained from exercising its rights in the Brunot area but, after a recent decision of the Southern Ute Indian Tribal Council, the Tribe now plans to allow tribal members to exercise their rights under the Brunot Agreement. Prior to exercising those rights, however, the Tribe and the Division of Wildlife worked together to develop an MOU in recognition of the parties? shared responsibility for the well-being and perpetuation of the wildlife resources and habitat of the area.
....The MOU includes agreement regarding the types of species to be taken and a process by which allocation of rare game species such as moose, bighorn sheep, and mountain goats will be equitably allocated between tribal hunters and hunters licensed by the Division of Wildlife. There are currently 1,431 members of the Southern Ute Indian Tribe but, on average, only 225 members obtain deer or elk licenses annually for hunting on the Reservation. Importantly, the Brunot Agreement does not give members of the tribe any rights to hunt on private land in the Brunot area without first obtaining landowner permission and Brunot hunting rights are not transferable to other hunters who do not belong to Ute tribes.