Dirty December Trail Run

DEC
20
2026
A holiday trail event in San Diego on December 20, 2026 offering Marathon, Half Marathon, 10K and a new six hour hill climb based on 2.5 mile laps. Costume awards are presented in solo and team categories.
Sun 20 Dec 2026
Marathon Half Marathon 10 kilometers

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Dirty December Trail Run

The Dirty December Trail Run takes place on December 20, 2026 in San Diego, CA. The event is presented as a low key holiday trail run and offers multiple distance options for trail runners.

Available distances:

  • Marathon
  • Half Marathon
  • 10K
  • Hill Climb 6HR

The Hill Climb 6HR is a new event focused on repeated up-and-down laps of Cardiac hill. Each lap is a 2.5 mile down-and-back loop; runners complete as many 2.5 mile laps as they can within six hours. Reported cumulative lap distances include 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30 and so on. Winners in the hill event receive King and Queen of the hill awards.

The event includes a costume component with awards in two categories: solo costumes and team costumes. Registration for the event closes on Fri, Dec 18 at 11:59 PM PT.

Location is San Diego, CA. The description emphasizes trail running on a holiday weekend, multiple standard race distances, a timed hill-climb endurance format, and costume awards in two categories. Visit the organization's website for the most recent information.

Marathon
Marathon
Half Marathon
1/2 Marathon
10 km
10k
Hill Climb 6hr
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