From the 3,546 ft. siding at Withrow (MP 432.1/23.7), where the line departs the north side the the WC Minneapolis sub., the Minnesota Transportation Museum's Osceola & St. Croix Valley operates on the single track, Track Warrant Control, line, with maximum speed 25 mph, heading northeast, north to the 3,094 ft. siding at Maple Island (MP 28.2), northeast, east, east-northeast, north past Marine (MP 33.2), where the line descends north-northeast through Copas and William O'Brien State Park and then bridges over the St. Croix River on a large deck-girder bridge, from Minnesota into Wisconsin, hugging the cliffs on the east bank of the river, past the former location of a small yard on the southeast side of the line, to the 2.687 ft. siding at Osceola (MP 42.8), where the depot is on the southeast side of the line as the line turns east-northeast, then east and north-northeast to the yard at Dresser (MP 47.7), where the depot is on the northwest side of the line and there is a road crossing just east of the depot, with a wye on the southeast side of the line east of the road, where there was once a busy junction with lines heading north to Duluth and east to Sault Ste. Marie.