The southeast is the only quarter of South Dakota in which both of our interstate highways pass. The speed limit might be 80 mph, but there’s plenty of opportunity to stop, stretch your legs and take a leisurely stroll among nature. Start on I-29 near North Sioux City at the Adams Homestead and Nature Preserve. Take Exit 62 and roam the forests of Newton Hills. In Brookings, the 25 acres of formal display gardens and 45 acres of arboretum fill the air with a fresh, flowery aroma and bright colors. On I-90, head west from the Minnesota line until you reach Highway 11. Head north to explore the wondrous quartzite of Palisades State Park or south to hit the trails of the Big Sioux Recreation Area. Lake Vermillion (Exit 374) is a peaceful spot on the prairie, and Great Bear Recreation Area in Sioux Falls has great summer hiking trails to explore.