Dads can enjoy the thrill of ziplining for FREE this Father’s Day Weekend at Boyne Mountain. Friday through Sunday, show your love for Dad by joining him on a Zipline Adventure Tour or a Twin Zip Ride. Both are FREE for Dad when accompanied by one or more paying family members. Reservations are required for the Zipline Adventure Tour. Please book by calling (231) 549-7256. Reservations are not required for the Twin Zip Ride.