Thriller Lake 12 Hour
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Thriller Lake 12 Hour and Trick or Treat Fun Run
The event takes place around Miller Lake at Little Mulberry Park in Gwinnett County, GA, using the paved 2.2 mile Miller Lake loop. The main endurance formats are timed loop events held over set periods, and there is also a separate evening Fun Run that follows the same loop.
Distances and formats
- 12 hour timed loop (individual and relay options)
- 6 hour timed loop
- 3 hour timed loop
- Trick or Treat Fun Run : 2.2 mile Miller Lake loop
The endurance races use repeated laps of the lake trail. Overall winners in 2026 receive gift cards provided by Classic Running. The Fun Run is untimed and designed as a family friendly, Halloween themed loop with multiple trick or treat stations staffed by costumed volunteers handing out candy. Participants receive a glow in the dark wrist band at check in and children may receive a special treat bag. Strollers are allowed on the trail; bicycles, scooters, and motorized devices are discouraged unless medically necessary. Spectators and family may use the start and finish area but everyone on the course must be registered for the event. PERC Coffee will be brewed on site for participants, spectators, and crew. Visit the organization's website for the most recent information.
