Wisconsin's longest river — 430 miles from Lac Vieux Desert on the Michigan border to the Mississippi River at Prairie du Chien. The Wisconsin Dells section carved dramatic sandstone canyons during glacial lake outburst floods 15,000 years ago. Below the Dells, the lower Wisconsin flows free for 92 miles as one of the longest undammed stretches in the Midwest — a designated State Riverway with sandbars, eagles, and classic canoe camping.
River conditions are community-verified. CFS ranges, difficulty ratings, and trip sections may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level. If you spot an error, use the Improve This River button at the top of the page — your local knowledge is what makes this atlas accurate.