Lake McDonald is the largest lake in Glacier National Park. It is located at 48°35′N 113°55′W in Flathead County

Flathead County, Montana

-National protected areas:* Pacific Northwest National Scenic Trail * Flathead National Forest * Glacier National Park * Kootenai National Forest * Lolo National Forest * Lost Trail National Wildlife Refuge-Demographics:...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Montana

Montana

Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

. Lake McDonald is approximately 10 miles (16 km) long, and over a mile (1.6 km) wide and 472 feet (130 m) deep, filling a valley formed by a combination of erosion and glacial

Glacier

A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

 activity. Lake McDonald lies at an elevation of 3,153 feet (960 m) and is on the west side of the Continental Divide

Continental Divide

The Continental Divide of the Americas, or merely the Continental Gulf of Division or Great Divide, is the name given to the principal, and largely mountainous, hydrological divide of the Americas that separates the watersheds that drain into the Pacific Ocean from those river systems that drain...

. The Going-to-the-Sun Road

Going-to-the-Sun Road

Going-to-the-Sun Road is the only road through the heart of Glacier National Park in Montana, USA. It was completed in 1932, and it is the only road that crosses the park, going over the Continental Divide at Logan Pass. A fleet of 1930s red tour buses "jammers", rebuilt in 2001 to run on propane...

 parallels the lake along its southern shoreline. The surface area of the lake is 6,823 acres (27.6 km²).

The lake is home to numerous native species of trout

Trout

Trout is the name for a number of species of freshwater and saltwater fish belonging to the Salmoninae subfamily of the family Salmonidae. Salmon belong to the same family as trout. Most salmon species spend almost all their lives in salt water...

, and other game fish. Catchable species include, but are not limited to - cutthroat trout

Cutthroat trout

The cutthroat trout is a species of freshwater fish in the salmon family of order Salmoniformes. It is one of the many fish species colloquially known as trout...

, rainbow trout

Rainbow trout

The rainbow trout is a species of salmonid native to tributaries of the Pacific Ocean in Asia and North America. The steelhead is a sea run rainbow trout usually returning to freshwater to spawn after 2 to 3 years at sea. In other words, rainbow trout and steelhead trout are the same species....

, bull trout

Bull trout

The bull trout, Salvelinus confluentus, is a char of the family Salmonidae native to northwestern North America. Historically, S. confluentus has been known as the "Dolly Varden" , but was re-classified as a separate species in 1980. Bull trout are listed as a threatened species under the U.S....

 (char), lake trout

Lake trout

Lake trout is a freshwater char living mainly in lakes in northern North America. Other names for it include mackinaw, lake char , touladi, togue, and grey trout. In Lake Superior, they can also be variously known as siscowet, paperbellies and leans...

 (char), Lake Superior whitefish

Freshwater whitefish

The freshwater whitefish are fish of the subfamily Coregoninae in the salmon family Salmonidae. Along with the freshwater whitefish, the Salmonidae includes the freshwater and anadromous trout and salmon species as well as graylings...

, mountain whitefish, kokanee salmon (landlocked sockeye), and suckers. However, the lake is nutrient-poor and is not considered a prime fishing

Fishing

Fishing is the activity of trying to catch wild fish. Fish are normally caught in the wild. Techniques for catching fish include hand gathering, spearing, netting, angling and trapping....

 destination. Grizzly bear

Grizzly Bear

The grizzly bear , also known as the silvertip bear, the grizzly, or the North American brown bear, is a subspecies of brown bear that generally lives in the uplands of western North America...

s, black bear

American black bear

The American black bear is a medium-sized bear native to North America. It is the continent's smallest and most common bear species. Black bears are omnivores, with their diets varying greatly depending on season and location. They typically live in largely forested areas, but do leave forests in...

, moose

Moose

The moose or Eurasian elk is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a dendritic configuration...

, and mule deer

Mule Deer

The mule deer is a deer indigenous to western North America. The Mule Deer gets its name from its large mule-like ears. There are believed to be several subspecies, including the black-tailed deer...

 are found in many places near the lake but are most common on the north shore. The lake is surrounded by a dense coniferous forest dominated by various species of spruce

Spruce

A spruce is a tree of the genus Picea , a genus of about 35 species of coniferous evergreen trees in the Family Pinaceae, found in the northern temperate and boreal regions of the earth. Spruces are large trees, from tall when mature, and can be distinguished by their whorled branches and conical...

, fir

Fir

Firs are a genus of 48–55 species of evergreen conifers in the family Pinaceae. They are found through much of North and Central America, Europe, Asia, and North Africa, occurring in mountains over most of the range...

, and larch

Larch

Larches are conifers in the genus Larix, in the family Pinaceae. Growing from 15 to 50m tall, they are native to much of the cooler temperate northern hemisphere, on lowlands in the north and high on mountains further south...

. At the westernmost section of the lake in Apgar there is a National Park Service visitor center, limited lodging and dining facilities as well as outboard powerboats available for rental. Lake McDonald Lodge is the largest lodging facility on the lake and is approximately 5 miles (8 km) east along the Going-to-the-Sun Road.

McDonald Creek flows into and drains from the lake, and empties into the Middle Fork Flathead River

Middle Fork Flathead River

The Middle Fork Flathead River is a river in western Montana in the United States, forming the southwestern boundary of Glacier National Park. Its drainage basin lies to the east of the South Fork Flathead River and the Hungry Horse Reservoir...

shortly after.