Highway 155 passes through the Colville Indian Reservation, one of the largest reservations in Washington, with about 7,700 enrolled members of the Colville Confederated Tribes. This was the final home for Chief Joseph and the Nez Perce, who fought a series of fierce battles with the U.S. Army in the 1870s after the U.S. government enforced a treaty that many present-day historians agree was fraudulent. Chief Joseph lived on the Colville reservation until his death in
1904. There's a memorial to him off Highway 155 east of the town of Nespelem, 17 miles north of the dam; four blocks away (two east and two north) is his grave. You can drive through the reservation's undeveloped landscape, and except for a few highway signs you'll feel like you've time-traveled to pioneer days. The Colville Tribal Museum (512 Mead Way, Coulee Dam, 509/633–0751, open daily 8:30–5) is worth a visit.
Coulee Dam, Washington, 99116, United States