Moms can enjoy the thrill of ziplining for FREE this Mother’s Day Weekend at Boyne Mountain! Friday through Sunday, show your love for Mom by joining her on a Zipline Adventure Tour or a Twin Zip Ride. Both are FREE for Mom 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.