Halloween Havoc Half Marathon - Fountain Valley, CA
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Event information
The Halloween Havoc takes place on October 26, 2025, in Fountain Valley, California. The event includes the following distances:
- 5K
- 10K
- Half Marathon
The published start location is Mile Square Park, Parking Lot D, across the street from 11014 Lavender Ave, Fountain Valley, CA 92708. Park entry at the park has a $5.00 per car fee. Limited free street parking is available.
Course and logistics
The courses are looped, with the start and finish at the same location. The event course is not closed to the public, so other park users may be present. On-course support includes two water stations and restrooms along the route. Participants may leave personal items with staff at the registration tent for gear check; participants are asked to bring their own bag. Race bibs should be worn on the front of the shirt for timing and photo purposes. Awards include first place medals for the overall first male and female in each distance. Race results and a link to photos are provided the day after the event. Race photos are free. Visit the organization's website for the most recent information.