Lewis Lake is located in the U. S. state of Wyoming

Wyoming

Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

 in the southern part of Yellowstone National Park

Yellowstone National Park

Yellowstone National Park, established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872, is a national park located primarily in the U.S. state of Wyoming, although it also extends into Montana and Idaho...

, about 4 miles (6.4 km) southeast of Shoshone Lake, and approximately 10 miles (16.1 km) southwest of Yellowstone Lake

Yellowstone Lake

Yellowstone Lake is the largest body of water in Yellowstone National Park, The lake is 7,732 feet above sea level and covers with 110 miles of shoreline. While the average depth of the lake is 139 feet its deepest spot is at least 390 feet...

. Lewis Lake and Shoshone Lake

Shoshone Lake

Shoshone Lake is a backcountry lake with the area of elevated at in the southwest section of Yellowstone National Park, Wyoming, US. It lies at the headwaters of the Lewis River a tributary of the Snake River. The U.S...

 are both located a few miles northeast of the Pitchstone Plateau.

The Lewis River

Lewis River (Wyoming)

The Lewis River is an tributary of the Snake River. The entire course of the river is located within the boundaries of Yellowstone National Park in Wyoming. The river is named for Meriwether Lewis, commander of the Lewis and Clark Expedition....

 is the lake's primary inflow, draining south from Shoshone Lake

Shoshone Lake

Shoshone Lake is a backcountry lake with the area of elevated at in the southwest section of Yellowstone National Park, Wyoming, US. It lies at the headwaters of the Lewis River a tributary of the Snake River. The U.S...

. The primary outflow of Lewis Lake is also the Lewis River, continuing south to join the Snake River

Snake River

The Snake is a major river of the greater Pacific Northwest in the United States. At long, it is the largest tributary of the Columbia River, the largest North American river that empties into the Pacific Ocean...

 near the southern boundary of Yellowstone National Park. A few small creeks also feed Lewis Lake. There are several hot springs emptying into the lake on its northwestern shore and two more hot springs at the lake's southern end where it empties into the Lewis River. A campground is located on the lake's southeast shore. Yellowstone National Park's South Entrance Road (which is also numbered as U.S. Route 287

U.S. Route 287

U.S. Route 287 is a north–south United States highway. It is long. It serves as the major truck route between the Texas cities of Fort Worth and Amarillo...

, U.S. Route 89

U.S. Route 89

U.S. Route 89 is a north–south United States Highway with two sections, and one former section. The southern section runs for 848 miles from Flagstaff, Arizona, to the southern entrance of Yellowstone National Park...

, and U.S. Route 191

U.S. Route 191

U.S. Route 191 is a spur of U.S. Route 91 that has two branches. The southern branch runs for 1,465 miles from Douglas, Arizona on the Mexican border to the southern part of Yellowstone National Park. The northern branch runs for 440 miles from the northern part of Yellowstone National Park to...

), run along the east side of Lewis Lake.

Like the river, Lewis Lake is named for Meriweather Lewis, commander of the Lewis and Clark Expedition

Lewis and Clark Expedition

The Lewis and Clark Expedition, or ″Corps of Discovery Expedition" was the first transcontinental expedition to the Pacific Coast by the United States. Commissioned by President Thomas Jefferson and led by two Virginia-born veterans of Indian wars in the Ohio Valley, Meriwether Lewis and William...