Welcome Centers & Rest Areas Looking for directions? A place to stretch your legs? South Dakota has six Welcome Centers along I-90 and I-29, where you’ll find knowledgeable travel counselors, maps and brochures, restrooms, free Wi-Fi and more. Black Hills Visitor Information Center (eastbound and westbound) I-90 at milepost 61 Open year-round Vermillion Welcome Center (northbound and southbound) I-29 at milepost 26.6 Minuteman Missile National Historic Site Visitor Center (eastbound and westbound) I-90 at milepost 131 Chamberlain Welcome Center (eastbound and westbound) I-90 at milepost 264.4 Wilmot Welcome Center (northbound and southbound) I-29 at milepost 213.8 Spearfish Welcome Center (eastbound) I-90 at milepost 1 Valley Springs Welcome Center (westbound) I-90 at milepost 412.1 Note : Scan for directions to South Dakota’s Welcome Centers and rest areas With the exception of the Black Hills Visitor Information Center, information desks close for the winter season (September/October through mid-May). All other amenities, including Wi-Fi, are available year-round. Needles Highway (SD Highway 87)