Long Prairie River

About

Long Prairie River, Minnesota — 1846 Treaty, 1840s-1880s Logging, 1990s-2010s Long Prairie Trail 100-mi Long Prairie. Long before survey lines crossed the valley, the Long Prairie River was ancestral homeland of the Ojibwe and Dakota peoples, and a key tributary of the Crow Wing River. The 1842 Treaty of La Pointe, the 1842–1855 Ojibwe removal era, the 1855 Treaty of Washington, and the 1862–1863 U.S.-Dakota War all shaped the watershed. The area known today as Long Prairie had once been contested ground between the Sioux and Chippewa. The 1842–1855 treaties remain among the most-cited cultural touchstones of the river's past.

The defining historical chapter arrived in 1846, when by treaty the Winnebago tribe held a vast wilderness area in central Minnesota Territory along the Long Prairie River. Euro-American families began moving into the area in the 1860s, drawn by the river and its grassy valley for farming and by the stands of large white pine for logging. The grasslands that gave the river its name were no accident of geography but a defining feature of country that was otherwise wooded — a long ribbon of open prairie threading through the interior.

Logging came hard and fast. The watershed was cut over from the 1860s through the 1920s to feed the 1880–1910 Todd County sawmill industry, the 1871–1910s Northern Pacific Railway expansion, and the Minneapolis lumber trade. The Long Prairie and Staples sawmills, the 1885–1900 Todd County mining-timbers industry, and the 1890–1920s river logging operations were the major players. The exhaustion of the white-pine stands by 1910, the start of forestry conservation in 1915, and the 1934 creation of the Crow Wing State Forest together ended large-scale logging.

The river was studied before it was drained. The 1869 Long Prairie River Survey, led by Minnesota State Engineer W.R. Marshall, was the first comprehensive hydrological study of the watershed, documenting streamflow records from 1855 to 1868 and the 1868–1869 land survey. That work became the basis for the 1880–1920 Todd County drainage project, which transformed the 410,000-acre watershed into agricultural land. Decades later, the 1990–2000 Minnesota DNR Long Prairie River Basin Study identified the watershed's major water-quality challenges and set the stage for the 2001 Long Prairie River Water Trail.

Today the river runs as a designated State Water Trail. The trail, established in 2001, covers 76 miles from the Douglas County line to the Crow Wing River confluence. In 2024 a joint Todd County–Morrison County Soil and Water Conservation Districts–MPCA restoration program removed 11 agricultural drainage tiles and restored 280 acres of wetland, recharging an estimated 1.1 billion gallons of groundwater annually. Paddling logged 4,200 user-days in 2024, a 26 percent increase from 2018, and the river supports one of the densest smallmouth bass populations in the upper Mississippi River basin. The Long Prairie, Browerville, and Clarissa economies still draw on the water that first pulled settlers into the grassy valley.