The 120-mile-long Pecatonica River, as well as its 50-mile East Branch, originate in and flow through southwestern Wisconsin, where remnants of oak savanna and tallgrass prairie provide glimpses of pre-settlement Wisconsin.
Yellowstone Lake State Park
Yellowstone Lake State Park is in the driftless area of southwest Wisconsin. This 1,000-acre park, with an additional 455-acre lake offers visitors ample space to enjoy camping, swimming, fishing, boating, hiking, biking and picnicking. In winter the park is open to ice fishing, snowmobiling and cross-country skiing.