Jellystone Park is celebrating its 100th anniversary, however it may be for the last time, because attendance is down and Mayor Brown wants to close the park and sell the land. If the park is closed, Yogi Bear and Boo Boo will lose their home. They join forces with Ranger Smith to save Jellystone from closing forever. Yogi must really prove in this endeavor that he is "smarter than the average bear".

Three friends, whose lives have been drifting apart, reunite for the funeral of a fourth childhood friend. When looking through their childhood belongings, they discover a trunk which contained details on a quest their friend was attempting. It revealed that he was hot on the trail of the $200,000 that went missing with airplane hijacker D.B. Cooper in 1971. They decide to continue his journey, but do not understand the dangers they will soon encounter.