Upper Iowa River

About

Upper Iowa River, Iowa Minnesota — 1840s-1880s Milling, 2010s Upper Iowa Water Trail, 156-mi Decorah Winneshiek County. Long before any survey line crossed the valley, the Upper Iowa River bluffs belonged to the Ho-Chunk (Winnebago) people, who lived here for centuries before European contact. Effigy mounds along the ridgelines — some in the shapes of bears and birds — date to 500–1000 CE and rank among the most significant archaeological sites in the Midwest. The Dakota used the valley seasonally as well. That layered occupation set the cultural baseline for everything that came after.

Settlement arrived in stages. The 1820s–1850s marked the frontier period, and by the 1860s settlers had established the first mills along the river, according to the Iowa Geological Survey. The milling era stretched from the 1840s into the 1880s, tying the current to the region's early industrial economy. Overlapping that stretch was the logging era: from the 1830s through the 1920s, the watershed was worked by local sawmills, logging drives, and downstream lumber operations. The old-growth stands were exhausted by 1910; state forestry conservation began in 1915, and the establishment of state forests in the 1930s finally ended large-scale cutting.

The river's hydrology was documented as the extractive era wound down. The first comprehensive studies came out of the 1870s USGS survey work, followed by early gauging-station establishment and, later, state geological streamflow assessments. Those baselines mattered because a century of logging, agriculture, and industry had left their mark — impacts that mid-century water-pollution studies and Clean Water Act assessments would eventually have to reckon with.

Restoration became the river's defining modern chapter. The 1990s brought the Upper Iowa River Watershed Restoration Project, and in 2005 a multi-state conservation partnership recognized the Driftless Area as one of the most ecologically unique landscapes in the Midwest. The Upper Iowa corridor became a focal point for coldwater habitat restoration, native trout recovery, and sustainable agriculture on the surrounding karst. The 2010s added a Water Trail Management Plan and a Corridor Management Plan, formalizing recreational stewardship along the 156-mile route. The river carries an Iowa Scenic River designation and threads the Driftless Area National Wildlife Refuge.

Today the paddling divides cleanly into four reaches. The 25 miles from Kendallville to Bluffton run the best bluffs section. Bluffton to Decorah covers 30 miles of coldwater trout water. From Decorah to the Upper Iowa Access, 15 miles of Class I–II riffles keep the pace light, and the final 30 miles from there to the Mississippi confluence open into a wide valley. Anglers work the river for both trout and walleye, and the water trail supports canoeing, kayaking, tubing, and fishing across all four stretches. Nearby, the Decorah Ice Cave State Preserve draws visitors off the water. Liveries make the logistics simple: Hruska Canoe Livery rents canoes and kayaks from Kendallville to Decorah, and Randy's Bluffton Store handles shuttles, camping, and river information at Bluffton. The result is a Driftless river that carries its history lightly — a working corridor turned recreational one, still cutting the same bluffs the mound builders once watched over.