Halloween Havoc Half Marathon - Fountain Valley, CA

OCT
26
2025
Join Halloween Havoc in Fountain Valley on October 26, 2025, offering 5K, 10K and a half marathon on looped courses with water stations and restrooms along the route. Free race photos, next day results and awards for top finishers.
Sun 26 Oct 2025
Half Marathon 10 kilometers 5 kilometers

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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.

Half Marathon
Half Marathon
10 km
10k
5 km

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