Lassie's Great Adventure

Timmy and Lassie are swept away in a carnival hot air balloon which eventually comes to rest far from home in the Canadian wilderness. Unsure of their surroundings, the boy and dog hunt for food, battle a wild boar, and brave whitewater rapids on a handmade raft. After being rescued by a mysterious Indian, the two adventurers are finally reunited with their family through the assistance of the Royal Canadian Mounted Police (Wikipedia)