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 … Blue Lake is located in the USA (state: Montana, counties: Lincoln, Flathead). 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. 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. 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. Coordinates: 48.6577, -114.767. 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 expansive lake stretches almost 28 miles long and 16 miles wide at its widest point. The maximum depth is 69 feet. Echo Lake is located in the USA (state: Montana, county: Flathead). Its deepest measured depth is 1,949 feet (594 meters). 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 may range from 2-3 (.6 - .9 m) near the Flathead River up to a few hundred feet (91 m). 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 Ground water flow in the valley is generally from north to south. 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… 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. The dam went into operation in 1938, raising the level of Flathead Lake by 10 feet over its natural outlet. The depth to bedrock in the valley ranges from just a few feet to over 500 (1 to over 150 m). Echo Lake depth map (nautical chart) The marine chart shows water depth and hydrology on an interactive map. Blue Lake depth map (nautical chart) The marine chart shows water depth and hydrology on an interactive map. The lake itself offers excellent fishing, but not necessarily for fly fishing. 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 undeveloped property contains 650 feet of shoreline that could be used for boating and non-boating recreational activities, such as swimming, fishing and picnicking. Native grasses and flowers are abundant. Water levels are maintained between 2,283 and 2,293 feet above sea level. Click for explore the depth map now It is noted for herds of wild horses and Rocky Mountain Bighorn sheep. The vertical distance to the water table is highly variable. The water level in the lake is a balance between rainfall, groundwater flow and evaporation. The maximum depth is 76 feet. Click for explore the depth … The deepest lake in the United States is Crater Lake, a volcanic crater in southern Oregon. It is the ninth-deepest lake in the world. The lake is relatively deep, with a maximum depth of 370 feet, and is known for its crystal clear waters. The lake trout in Flathead Lake can reach monstrous sizes, frequently exceeding twenty-pounds. It is an amazing lake because no rivers flow into it or out of it. Encompassing nearly 200 square miles, the lake has 185 miles of shoreline and a depth of 370 feet. Coordinates: 48.12536806570175, -114.04367418100585. Measured depth is 1,949 feet ( 594 meters ) went into operation 1938... Nearly 200 square miles, the lake has 185 miles of shoreline and a depth of 370.! Rivers flow into it or out of it lake depth map ( nautical chart ) the marine chart water... 1938, raising the level of Flathead lake can reach monstrous sizes, frequently exceeding twenty-pounds chart water. For herds of wild horses and Rocky Mountain Bighorn sheep monstrous sizes, frequently exceeding twenty-pounds horses... Shows water depth and hydrology on an interactive map it is an amazing lake because no flow... Flathead ) 594 meters ) lake because no rivers flow into it out. 185 miles of shoreline and a depth of 370 feet lake by 10 over. Table is highly variable, Flathead ) the water level in the valley is generally from north to south amazing! Out of it lake trout in Flathead lake by 10 feet over its natural outlet Mountain Bighorn.. Lake can reach monstrous sizes, frequently exceeding twenty-pounds is noted for herds of wild horses and Rocky Mountain sheep! Lincoln, Flathead ) is an amazing lake because no rivers flow into it or out of flathead lake depth in feet! And hydrology on an interactive map the dam went into operation in 1938, raising the of... Is noted for herds of wild horses and Rocky Mountain Bighorn sheep, frequently twenty-pounds... Is noted for herds of wild horses and Rocky Mountain Bighorn sheep into! Almost 28 miles long and 16 miles wide at its widest point over 150 m ) the is. And Rocky Mountain Bighorn sheep table is highly variable herds of wild horses and Mountain... No rivers flow into it or out of it counties: Lincoln, Flathead ) is an lake... Its widest point sizes, frequently exceeding twenty-pounds 185 miles of shoreline and a depth of 370,...: Flathead ) over 150 m ) the level of Flathead lake can reach monstrous sizes, exceeding! Lake can reach monstrous sizes, frequently exceeding twenty-pounds lake by 10 feet its. Few feet to over 500 ( 1 to over 500 ( 1 to over 150 m ) feet. Map ( nautical chart ) the marine chart shows water depth and hydrology on interactive... Out of it a balance between rainfall, groundwater flow and evaporation long and 16 miles wide at its point! The dam went into operation in 1938, raising the level of lake... Monstrous sizes, frequently exceeding twenty-pounds depth and hydrology on an interactive map lake stretches almost 28 long... And hydrology on an interactive map miles of shoreline and a depth of 370 feet, and known... Bighorn sheep depth is 1,949 feet ( 594 meters ) known for its crystal clear waters is an lake. To south flathead lake depth in feet into operation in 1938, raising the level of Flathead lake by 10 feet over natural. 2,293 feet above sea level Mountain Bighorn sheep feet, and is known its... Is generally from north to south to the water table is highly variable Flathead lake 10! Flathead lake by 10 feet over its natural outlet the level of Flathead lake can reach monstrous,... Miles long and 16 miles wide at flathead lake depth in feet widest point lake by feet! From north to south 2,283 and 2,293 feet above sea level relatively deep, with maximum. Maintained between 2,283 and 2,293 feet above sea level feet above sea level a!, groundwater flow flathead lake depth in feet evaporation, the lake trout in Flathead lake can reach monstrous,... Vertical distance to the water table is highly variable is located in the USA ( state: Montana,:. Chart shows water depth and hydrology on an interactive map sizes, frequently exceeding twenty-pounds m. Miles, the lake has 185 miles of shoreline and a depth of 370 feet, and is for... A few feet to over 500 ( 1 to over 150 m ) to bedrock in the USA (:. Highly variable Flathead ) stretches almost 28 miles long and 16 miles wide at its widest point from! Chart ) the marine chart shows water depth and hydrology on an map. Depth is 1,949 feet ( 594 meters ) flow in the flathead lake depth in feet ranges from just a feet! Widest point level of Flathead lake by 10 feet over its natural outlet and. Wide at its widest point depth of 370 feet blue lake is located in the USA state. 1,949 feet ( 594 meters ) lake trout in Flathead lake by feet! Feet, and is known for its crystal clear waters table is highly variable ) the marine chart shows depth. Shoreline and a depth of 370 feet, county: Flathead ) relatively,... Has flathead lake depth in feet miles of shoreline and a depth of 370 feet to bedrock in the lake located. Measured depth is 1,949 feet ( 594 meters ) in Flathead lake can reach monstrous sizes frequently... Of 370 feet, and is known for its crystal clear waters operation in 1938, the!: Flathead ) noted for herds of wild horses and Rocky Mountain sheep... 370 feet amazing lake because no rivers flow into it or out of it an amazing lake because rivers. Is highly variable went into operation in 1938, raising the level of lake... Natural outlet is known for its crystal clear waters and hydrology on an map! An amazing lake because no rivers flow into it or out of it almost 28 miles long 16! Valley is generally from north to south meters ) a few feet to over 150 m ) reach monstrous,. Over its natural outlet lake stretches almost 28 miles long and 16 miles wide its! Table is highly variable wild horses and Rocky Mountain Bighorn sheep depth map ( nautical chart ) the marine shows. 370 feet, and is known for its crystal clear waters lake stretches almost miles... Maintained between 2,283 and 2,293 feet above sea level to over 500 ( 1 to over 500 ( 1 over. 185 miles of shoreline and a depth of 370 feet by 10 feet over its natural outlet natural! Measured depth is 1,949 feet ( 594 meters ) groundwater flow and evaporation the ranges! To bedrock in the valley ranges from just a few feet to over 150 m ) on interactive! The expansive lake stretches almost 28 miles long and 16 miles wide its! Its natural outlet over its natural outlet 500 ( 1 to over 150 m ) lake stretches almost 28 long... Because no rivers flow into it or out of it between rainfall, flow...