The themes include Toy Story for the Disneyland Half Marathon, Monsters University for the Disneyland 10K, and The Incredibles for The Disneyland 5K. The Kids Races will feature an Up theme.
The 5th Annual Disneyland Double Dare, where runners complete both the 10K and the Half Marathon, will celebrate PIXAR Animation Studios.
The Disneyland Half Marathon Weekend is August 31 to September 3, 2017 at the Disneyland Resort.
Source: Disney Parks Blog