Minnesota

Maybe consider a short trip eastward toward the St. Croix River (Wisconsin - Minnesota border). It is one of the original eight rivers designated by the Wild and Scenic Rivers Act of (co-sponsored by our own late senator and vice president, Walter Mondale and senator, Gaylord Nelson of Wisconsin). You can rent a canoe below Taylor's Falls and travel any distance you choose (https://www.dnr.state.mn.us/state_parks/starter_kit/paddle.html). The river is clean, sandy, and great for swimming throughout its entire length. The Mississippi River through both St. Paul and Minneapolis is unique too. The Stone Arch Bridge (https://www.minneapolisparks.org/parks-destinations/historical_sites/stone_arch_bridge/) and St. Anthony Falls mark the furthest north barges could travel on the Mississippi River. The pedestrian bridge is a wonderful place for pictures and close to public areas along the riverfront. The Mississippi River through the Twin Cities is designated as a National River and Recreation Area and partially managed by the National Park Service. The MN Valley National Wildlife Refuge is neat too (https://www.fws.gov/refuge/minnesota-valley/visit-us/trails). It protects almost 15,000 acres of land along the MN River in the heart of the Twin Cities.

If the weather is less than ideal, you could always visit the Science Museum of St. Paul and the History Center (home of the Minnesota Historical Society).