Yes, it is. In 1925, in Alaska, there was a diphtheria epidemic in Nome. Balto, a sled dog, was part of the relay that brought the much - needed medicine through harsh weather and difficult terrains. His journey was arduous, but he and his team managed to complete it successfully, and this real - life event inspired the story of 'Balto'.
Yes. The movie takes cues from a true historical event, but it might have added fictional elements to make it more engaging and visually appealing for the audience.