Marsh Creek (Portneuf River tributary)
# Marsh Creek (Portneuf River tributary)

Marsh Creek is a 56-mile-long (90 km) tributary of the Portneuf River in Bannock County, Idaho, United States.

## Description

Beginning at an elevation of 5,157 feet (1,572 m) 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 4,518 feet (1,377 m). It is roughly paralleled by Interstate 15/U.S. Route 91 in Idaho for most of its length.

