Ground water flow in the valley is generally from north to south. Click for explore the depth … Echo Lake is located in the USA (state: Montana, county: Flathead). It is an amazing lake because no rivers flow into it or out of it. The expansive lake stretches almost 28 miles long and 16 miles wide at its widest point. In recent weeks, Flathead Lake has entered the public awareness as the result of a viral image showing the lake’s ‘crystal’ clear waters. The geology of the Flathead Basin is a composite of numerous belt series formations: Appekunny argillite (4%), Grinnel argillite (6%), Missoula group (18%), Piegan group (10%), Ravalli The depth to bedrock in the valley ranges from just a few feet to over 500 (1 to over 150 m). The vertical distance to the water table is highly variable. Wildhorse Island, one of the State Parks, is the largest island in the lake at 2,100 acres, and rises 1,200 feet above the Lake. Blue Lake is located in the USA (state: Montana, counties: Lincoln, Flathead). The maximum depth is 76 feet. Blue Lake depth map (nautical chart) The marine chart shows water depth and hydrology on an interactive map. Coordinates: 48.12536806570175, -114.04367418100585. The water level in the lake is a balance between rainfall, groundwater flow and evaporation. The maximum depth is 69 feet. The lake itself offers excellent fishing, but not necessarily for fly fishing. Native grasses and flowers are abundant. It may range from 2-3 (.6 - .9 m) near the Flathead River up to a few hundred feet (91 m). The dam went into operation in 1938, raising the level of Flathead Lake by 10 feet over its natural outlet. The largest natural freshwater lake in the West, Flathead Lake sits in northwest Montana and is a sprawling blue jewel at the base of the Swan and Mission mountain ranges. Water levels are maintained between 2,283 and 2,293 feet above sea level. The fish species in the lake consist primarily of lake trout, pike, yellow perch and whitefish, with some rainbow trout, bass, kokanee salmon and bull trout also found. Mark Ward: 'Macman' Zimmer shares Flathead Lake tips during day of fishing MARK WARD Mar 11, 2015 Mar 11, 2015 Updated Apr 8, 2015 ... searching for a depth of 300 to 315 feet… Echo Lake depth map (nautical chart) The marine chart shows water depth and hydrology on an interactive map. Data from the United States Geological Survey shows Flathead Lake’s water level has been dipping close to the 2,982-foot mark since the beginning of September — a depth … The lake is relatively deep, with a maximum depth of 370 feet, and is known for its crystal clear waters. The deepest lake in the United States is Crater Lake, a volcanic crater in southern Oregon. Click for explore the depth map now It is noted for herds of wild horses and Rocky Mountain Bighorn sheep. Created by Ice Age glaciers, almost thirty miles long and fifteen miles across at it’s widest point, Flathead lake is the largest natural lake in western U.S. A 160 mile shoreline and water covers nearly two-hundred square miles of Montana – and at 300 feet deep, you’d better restring your fishing … Anyone who tried to use one of the six existing FWP fishing access sites around the lake this summer knows they were packed with people and parking was limited to nonexistent. Its deepest measured depth is 1,949 feet (594 meters). Encompassing nearly 200 square miles, the lake has 185 miles of shoreline and a depth of 370 feet. Flathead Lake Trophic Status: Oligotrophic Surface Area: 122,425 acres Maximum Depth: 368 feet (112.2 meters) Flathead Lake has a basin area of 4,522,476 acres. It is the ninth-deepest lake in the world. 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