. "Reas Pass, elevation 6,930 feet (2,110 m), is a mountain pass on the Continental Divide in Fremont County, Idaho, about 8 miles (13 km) southwest of West Yellowstone, Montana. The pass lies essentially on the Idaho-Montana border, but modern maps show that the summit lies entirely in Idaho, because the Divide and the state line do not quite coincide here."@en . "Reas Pass"@en .