Henrys Lake

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Henrys Lake
Location	Idaho
Primary outflows	Henrys Fork River
Basin countries	United States
Surface area	8 sq mi (20.7 km²)
Surface elevation	6472 ft (1973 m)

Henrys Lake is a small shallow natural lake, approximately 8 sq mi (20.7 km²) in area, 4 mi (6.4 km) long and 2 mi (3.2 km) wide, located at 6472 ft (1973 m) in the mountains of southeastern Idaho in the United States. It is located on the southwest side of the Henrys Lake Mountains northern Fremont County, approximately 2 mi (3.2 km) south the continental divide along the Montana state line, just west of Targhee Pass. The lake is located in Caribou-Targhee National Forest.

The lake provides the headwaters of the Henrys Fork River, a tributary of the Snake River. The lakes lies less than 10 mi (16 km) across the continental divide from the headwaters of the Missouri River in southwestern Montana. In fact, had Lewis and Clark hiked the roughly ten miles east to Henrys Lake, they would have discovered a direct river route to the Pacific Ocean. Henrys Lake produces a tributary to the Snake River, which eventually empties into the Columbia River and subsequently the Pacific Ocean. Instead, after encountering a medium sized ridge that obstructed the view of Henrys Lake, the expedition decided to trudge westward, a decision that nearly led to the demise of the expedition.

Henrys Lake State Park is on the shore of the lake.