Horse Julius and Big Horse Racing (Russian: Конь Юлий и большие скачки, romanized: Kon' Juliy i Bol'shie Skachki, lit. '"The Horse Julius and the Great Races') is a 2020 animated Russian folklore spin-off film written by Vadim Sveshnikov, Maxim Sveshnikov, Alexsandr Boyarskiy and directed by Darina Schmidt and Konstantin Feoktistov. The writers and producers of The Three Bogatyrs resumed production in the tenth film of the Russian animated saga. Veteran producers for the series as well as CTB Film Company, Sergey Selyanov and Alexander Boyarsky resumed production for the film. Horse Julius and Big Horse Racing is the sequel to Three Heroes and The Heiress to the Throne (2018) and is dedicated to the feats of the character Bogatyr horse Julius.

Alyosha Popvich and his horse Julius have been folk heroes ever since they have defended Kievan Rus from attacks of villains. Julius always accompanied the hero as they found themselves in the very center of dangerous events. Prince Vladimir himself proclaimed Julius as the court horse. Julius asks to be married to the royal mare of the East - Zvezda. It is up to Julius to win a race to prove his status for marriage.

Melnitsa Animation Studio from St.Petersburg was the animation production studio in charge of design for the film. The studio uses traditional animation for the series known internationally as The Three Heroes. The road trip comedy was released in Russia on 31 December 2020 by the distribution company Sony Pictures under the Columbia Pictures label.