Halloween Havoc Half Marathon - Fountain Valley, CA

The Halloween Havoc Half Marathon in Fountain Valley, CA, is a festive running event held at Mile Square Park. Alongside the half marathon, participants can choose to run a 5K or 10K, all on looped courses starting and finishing at the same location. The half marathon course includes an additional out-and-back section, while the 5K and 10K share a looped route.

The event features a lively Halloween atmosphere with participants encouraged to wear costumes, and the finish line offers Halloween candy, spooky music, and surprises. The course is well-marked with water stations and restrooms, and awards are given to the top male and female finishers in each distance. Visit the organization's website for the most recent information.