Lassie's Great Adventure (1963)

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)
Cast and Information
Directed By: William Beaudine
Written By: Charles O'Neal, Monroe Manning, Sumner Arthur Long, Maria Little
Starring: Richard Kiel, June Lockhart, Jon Provost, Will J. White, Patrick Waltz, Walter Stocker, Robert Howard, Hugh Reilly, Walter Kelley, Leo Needham
Genres: Drama, Family/Kids, Adventure
Franchise: Lassie
Country: USA