The Northern Arapaho Tribe of Wyoming is one of four groups of Arapaho who originally occupied the headwaters of the Arkansas and Platte Rivers. They speak a variation of the Algonquin language, and are that people’s most southwest extension. Culturally, they are Plains Indians, but socially and historically distinct. The Northern Arapaho are a federally recognized tribe residing on the Wind River Indian Reservation.  Located between the scenic Wind River Range and Owl Creek Mountains, the 2.2 million acre reserve is shared by 4,200 Eastern Shoshone and 7,400 Northern Arapaho.