Continuity mistake: In the second scene where we first meet ranger Smith he is shuffling with some information pamphlets. When Ranger Jones yells his name he is startled and drops some of the pamphlets, but we can see that the last ones he put in were on their side. When the camera changes shots there appears to be some pamphlets sticking out. Then in the next shot they are gone. The pamphlets change locations between shots.
Continuity mistake: When Yogi sets up a contraption under the table you can see tools on top of the table when yogi leaves he leaves the tools on the table when the family comes to the table the tools are nowhere to be seen.
Continuity mistake: During the fireworks scene, Yogi discovers his scarf on fire. When he throws the fire stick, Ranger Smith catches it, and the fire goes out. In the next shot, the stick is once again on fire. However, when he throws the stick into Jellystone Lake, the fire is out again.
Continuity mistake: When Ranger Jones is testing the cart, he begins to frequently rotate the cart. The background smoke changes amount dramatically between shots.
Continuity mistake: When Yogi and Boo Boo are trying to catch the train, Yogi is frequently hit in the rump with fence posts. In these shots, you can see that there is nothing in front of the train. However, ten seconds later, the train stops in front of the park's train station.
Other mistake: As the movie opens, Yogi is using a telescope to watch a family at a picnic table. The reflection in the lens should be in reverse but it is not. It shows the same view.