The court held that hunting rights for the Crow tribe under a 19th-century treaty did not expire when Wyoming became a state. 

…Gorsuch, who was a judge in Colorado and dealt with his share of Native American rights cases before joining the Supreme Court, also provided the fifth vote in another American Indian treaty case dealing with the “Yakama Tribe and its right under an 1855 treaty to travel the public roads without being taxed on the goods brought to the reservation.”

Justice Neil Gorsuch Again Provides Decisive Vote In Native American Rights Case : NPR

nice