Mainprize Regional Park January 28, 2020 by Off Highway 39, 15 km South of Halbrite on Highway 705 OR 15 km west of Midale on Highway 606 Mainprize Regional Park Located on the shores of Rafferty Reservoir, Mainprize Park features golfing, fishing, golfing, lodging, and dining. Website | Facebook Page | (306) 458.2452