Union Pass
On U.S. Highway 287/89 between Moran Junction & Dubois.

Jim Bridger knew this pass as the “Triple Divide” — a point forming headwaters of three different continental drainage basins. One stream eventually feeds into the Green River, which in turn drains into the Colorado, and finally the Pacific Ocean in Southern California. Another feeds the Snake River, adding to the Columbia which heads for the Northwestern Pacific. The third stream drains into the Wind River, which feeds the Missouri, then the Mississippi, and ends up in the Gulf of Mexico.

Captain William F. Reynolds, of the Army Corps of Engineers, named the pass for the Union Army. He thought it was the center of the continent. Reynolds was on an 1860 mission for the War Department to find an immigration route from Fort Laramie to the source of the Yellowstone River.