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The
headwaters of the
Portneuf River are in northern Caribou County, very close to Bingham
County in southeast Idaho. The river flows south in Caribou County and
into Bannock County north of Lava Hot Springs. At Lava Hot Springs the
river turns west. Near McCammon the Portneuf turns north and flows
north and west to American Falls Reservoir. North and west of
Pocatello, the river forms the boundary between Bannock and Power
Counties.
Both the headwaters and the confluence of the Portneuf with the
Snake
River are on the Shoshone-Bannock Reservation. Over the course of its
flow, the Portneuf travels about 156 km (96 miles).
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Take a
virtual tour
of the
Portneuf!
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