Colorado has passed a landmark law redefining how bison are classified within the state, offering new protections for animals that migrate across state lines. Under the new legislation, bison may now be designated as either wildlife or livestock, depending on their origin and management context.

The change is particularly significant for bison herds migrating from Utah’s Book Cliffs region into western Colorado, near Grand Junction and Rangely. Previously, bison crossing into Colorado risked being treated solely as livestock, limiting conservation options and tribal stewardship.

The law was championed by the American Indian Affairs Interim Study Committee, reflecting Indigenous priorities for wildlife sovereignty and ecological restoration. Colorado Parks and Wildlife (CPW) will oversee implementation, with guidance from tribal partners and landowners.

While Colorado currently lacks established wild bison populations, the legislation lays groundwork for future rewilding efforts and cross-border habitat corridors.