Highway 12 is a major highway in the Canadian province of Saskatchewan. It begins in Saskatoon at the intersection of Idylwyld Drive and Highway 11 north (formerly beginning further south at the intersection with 22nd Street), initially running north on Idylwyld Drive concurrently with Highway 11 and Highway 16. Just outside Saskatoon's northern city limits, Highway 11 exits northeast from Idylwyld Drive and Highway 12 begins and travels north, passing through the city of Martensville. Highway 12 cross the North Saskatchewan River over Petrofka Bridge and passes through the town of Blaine Lake and intersects highway Highway 40, finally terminating at Highway 3 near Shell Lake. Highway 12 is about 135 km (84 mi) long.