Marsh Creek (Portneuf River tributary)

Marsh Creek is a 56 mi tributary of the Portneuf River in Bannock County, Idaho, United States.

Description
Beginning at an elevation of 5157 ft near Red Rock Pass, Marsh Creek flows generally north near the communities of Downey and Arimo. It parallels the Portneuf River starting near McCammon, reaching its mouth near Inkom, at an elevation of 4518 ft. It is roughly paralleled by Interstate 15/U.S. Route 91 in Idaho for most of its length.