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Lake Itasca
Lake Itasca Mississippi Source.jpg
The primary source of the Mississippi River on the edge of Lake Itasca
Location of Lake Itasca in Minnesota, USA.
Location of Lake Itasca in Minnesota, USA.
Lake Itasca
Location in Minnesota
Location of Lake Itasca in Minnesota, USA.
Location of Lake Itasca in Minnesota, USA.
Lake Itasca
Location in the United States
Location Itasca State Park, Clearwater County, Minnesota, US
Coordinates 47°13′05″N 95°12′26″W / 47.21806°N 95.20722°W / 47.21806; -95.20722
Type Glacial
Native name Omashkoozo-zaaga'igan Error {{native name checker}}: parameter value is malformed (help)
Primary inflows Nicolet Creek, Elk Lake outlet stream
Primary outflows Mississippi River
Basin countries United States
Surface area 1.8 sq mi (4.7 km2)
Average depth 20–35 ft (6–11 m)
Surface elevation 1,475 ft (450 m)
Islands Schoolcraft Island

Lake Itasca is a small glacial lake, approximately 1.8 square miles (4.7 km2; 1,200 acres) in area. Located in southeastern Clearwater County, in the Headwaters area of north central Minnesota, it is notable for being the headwater of the Mississippi River. The lake is in Itasca State Park. It has an average depth of 20 to 35 feet (6.1 to 10.7 m) and is 1,475 feet (450 m) above sea level.

The Ojibwe name for "Lake Itasca" is Omashkoozo-zaaga'igan (Elk Lake); this was changed by Henry Schoolcraft to "Itasca", coined from a combination of the Latin words veritas caput ("true head [of the Mississippi]"). It is one of several examples of pseudo-Indian place names created by Schoolcraft.

Source of the Mississippi River

It is the primary source of the Mississippi River which flows 2,340 mi (3,770 km) to the Gulf of Mexico. There are several tributaries that flow (most or all of the year) into the lake, one of which, by most modern definitions, as with the Nile River and Amazon River, would be considered the actual source, though less dramatic than the lake's outflow. Henry Schoolcraft identified Lake Itasca as the river's primary source in 1832. He had been part of a previous expedition in 1820 led by General Lewis Cass that had named nearby Cass Lake (which is downstream from Itasca) as the source of the river. There exists a dissenting claim that fur trader William Morrison was the first white person to discover the lake and identified it as the source of the Mississippi in 1804.

The western arm of the lake is fed by two streams on its south end. Nicollet Creek starts in a nearby spring. Another small stream leads into Itasca from Elk Lake, which in turn is fed by two other streams. The Ojibwa called Elk Lake and the stream Bekegamaag-zaaga'igan and Bekegamaag-ziibi (Sidelake Lake and Sidelake River), respectively. In 1887 Williard Glazier promoted a campaign to consider Elk Lake, which he called Glazier Lake, as the true source of the Mississippi. Its longest tributary originates at Little Elk Lake, which is 100 ft (30 m) higher in elevation and 11 km upstream from the Lake Itasca outflow, at 47°09′29″N 95°13′26″W / 47.158°N 95.224°W / 47.158; -95.224 and in the Mississippi watershed.

Jacob V. Brower, a land surveyor and president of the Minnesota Historical Society, after spending five months exploring the lakes, claimed that the lakes and streams further south of Lake Itasca were not the true source of the Mississippi because they were "too small". Modern explorers and geographers, however, have used the tiniest trickles of water to determine the source of the Amazon, Nile, and other rivers. Brower was to campaign aggressively to save the lake from logging. On April 21, 1891, the Minnesota Legislature officially made it a state park by a margin of one vote. Brower is now called the "Father of Lake Itasca" and the visitor center is named in his honor.

View of Lake Itasca, MN, July 2015
View of Lake Itasca taken in July 2015

The channel of the Mississippi as it emerges from the lake was bulldozed in the 1930s by the Civilian Conservation Corps, to create a more "pleasant experience" for visitors. The project included the draining of the surrounding swamp, the digging of a new channel, and the installation of a man-made rock rapids.

Common ground for science

Wpdms usgs photo itasca
Lake Itasca and Elk Lake

The lake is home to the University of Minnesota's Itasca Biological Station and Laboratories campus, which offers spring and summer courses and field research work year-round. The campus was established in 1909. Some of these buildings date from the 1930s and 40s, while others, including the largest building the Biome Center, were built more recently. The current Director of the biological station is Jonathan Schilling.

The Lake Itasca region claims a unique location, not only at the headwaters of the Mississippi River and amidst 25% of the old growth forest of Minnesota, but also at the juncture of the three great habitats of North America: the Great Plains, the Deciduous Forest of the south, and the Coniferous Forest of the north. Remnants of all three may be observed in the park.

The unique geography of the Lake Itasca region has found its way onto the classical music concert stage. Composer Ferde Grofe depicted the birthplace of the Mississippi River and the Native Americans who reside there in his popular classical epic the Mississippi Suite.

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