Haunted 5K, 10K, & 13.1M at Oklahoma City, OK (43)

The Haunted 5K, 10K, half marathon, and marathon is a Halloween-season road race in Stillwater, Oklahoma. All four distances start at 8:00 AM from Shelter #3 at Boomer Lake Park. The race hub is located beside the Boomer Park Splash Pad on the west side of the lake; this is important because the park address can direct drivers to the east side. The shorter races follow a 3.11-mile out-and-back route: 5K runners complete it once, and 10K runners complete it twice. The half marathon and marathon use a longer out-and-back setup, with marathon runners covering the full distance through repeated mileage on the same course format. Registration must be completed on RunSignup before race day, as there is no on-site registration. Packet pickup is available during a short window on race morning, opening 30 minutes before the start and closing 10 minutes before it.