Under their leader, Chief Washakie, the Eastern Shoshone people were established on the Wind River reservation under the Fort Bridger Treaty of 1868. The Wind River Reservation is located in the central region of the state of Wyoming. The reservation is home to two tribes: the Northern Arapaho and the Eastern Shoshone. The tribes operate as two separate tribal governments. The reservation covers 2,268,008 acres. There are 4,005 Eastern Shoshone. The Wind River Reservation is the resting place for two famous members of the Shoshone tribe: Chief Washakie and Sacajewea, the young woman who helped guide the Lewis and Clark expedition through Shoshone lands in 1804.