Hi Aaron!
Thank you for bringing your question to the Disney Parks Moms Panel. My little one just participated in his very first runDisney event at this years Tinker Bell Half Marathon Weekend! Lucky for us, he started walking just a few days before we went, so it was an exciting experience for us!
While we won't know the course for certain until runDisney releases the Digital Event Guide, historically they have utilized two different courses for the runDisney Kids Races at Disneyland Resort. They have both finished on the stretch of road that runs
parallel to Disneyland Drive between the Disneyland Hotel and
ESPN Zone. Looking at past Digital Event Guides to give you an idea, the
2017 Tinker Bell Half Marathon Weekend runDisney Kids Races stretched straight down this road. The other course they have used in the past finishes in the same area, but actually wraps around the ESPN Zone, as shown in the
2016 Digital Event Guide for the Disneyland Half Marathon Weekend. While this is subject to change, it is our best indicator of what you can expect for your upcoming runDisney vacation!
Please come back and let me know if you have any other questions!
-Lindsey ºOº