The Trail of the Coeur d'Alenes is a rail trail in the northwest United States, in northern Idaho. It follows the former Union Pacific Railroad right-of-way from Mullan, a mountain mining town near the Montana border, westward to Plummer, a town on the prairie near the Washington border. Generally following the Coeur d'Alene River, the rail line was abandoned in 1991, and the trail officially opened in March 2004.

Plummer is a city in Benewah County, Idaho, United States. The population was 1,044 at the 2010 census, up from 990 in 2000. It is the largest city within the Coeur d'Alene Reservation, and is accessed by U.S. Route 95, the state's primary north–south highway.