Lake Michigan

About

Jean Baptiste Point du Sable, 1779 — First Permanent Trading Post on Lake Michigan. Long before du Sable, the Lake Michigan region flowed through the ancestral territory of Indigenous peoples, including the area's historical tribal nations. The lake and its shores served as a primary travel corridor, hunting ground, and gathering place. The lake itself is the namesake of the Michigan country of the Algonquin-language Potawatomi people, and later of the Michigan Territory, established in 1805, and the state of Michigan. The cession framework that reshaped the region took form through the 1800s-era treaties, the 1830 Indian Removal Act, and the allotment era spanning the 1840s to the 1890s.

The strategic value of the site du Sable chose was not lost on the young United States. In 1803, the U.S. Army built Fort Dearborn at the mouth of the Chicago River to protect the region's position at the southern end of the Great Lakes water route. The fort was destroyed in 1812 during the War of 1812 and rebuilt in 1816. Around this southern anchor, a working landscape emerged, one that would be reshaped by the timber economy in the century that followed.

The Lake Michigan watershed was logged from the 1830s through the 1920s, feeding the regional timber industry that ran from the 1850s into the 1910s and the railroad expansion of the 1860s through the 1910s. Local sawmills, logging drives, and downstream lumber operations were the major operators. Large-scale logging came to a close through a sequence of turns: the exhaustion of old-growth stands by 1910, the start of state forestry conservation in 1915, and the establishment of state forests in the 1930s.

The first comprehensive look at the region's hydrology arrived with the USGS surveys of the 1870s through the 1890s, followed by USGS gauging station establishment from the 1880s into the 1910s and state geological survey streamflow assessments from the 1910s through the 1930s. State water pollution control studies from the 1950s to the 1970s and Clean Water Act assessments from 1972 to 2000 confronted more than a century of logging, agricultural, and industrial impacts. Today, USGS gauge 05438500 reports an average of 413 CFS, with an optimal paddling window of 200 to 625 CFS. Since 2010, the Illinois DNR, working with local watershed partnerships, has pursued streambank stabilization, native fish restocking, nutrient reduction, and water-quality improvements through 2024.

Lake Michigan is no isolated inland sea. It remains a working artery of the Great Lakes shipping system, reaching eastward to the Atlantic by way of the Saint Lawrence Seaway and southward to the Mississippi through the Illinois Waterway — a crossroads of commerce as vital now as it was at du Sable's founding. For paddlers, the state-designated Lake Michigan Water Trail organizes access along the Illinois shore, linking Waukegan Beach and Waukegan Harbor with Montrose Harbor, Diversey Harbor, and the Inner Harbor at Jackson Park.