Dirty December Trail Run

DEC
20
2026
Trail running at Sycamore Canyon with marathon, half marathon, 10K and hill climb options, notable elevation gains, required self-sufficiency, and costume prizes.
Sun 20 Dec 2026
Marathon Half Marathon 10 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Dirty December Run - Holiday Trail Fun Run

The event is a trail running event held at Sycamore Canyon with multiple course options. Distances offered include:

  • Marathon (approx 3,500 feet elevation gain)
  • Half Marathon (approx 2,300 feet elevation gain)
  • 10K (approx 1,000 feet elevation gain)
  • Hill Climb

Average temperatures for the event are listed near 66/46. All entrants receive a long sleeve technical shirt and finishers receive a finishers award. First place male and female overall in each distance receive a free race entry for the following year. A special prize is awarded for best costume.

The event enforces several safety and conduct rules. Runners must carry all food, fluids, clothing, and supplies needed between aid stations and must carry a minimum of 40 ounces of water. Except for medical emergencies, runners may accept no aid from others between aid stations. Participants must follow the marked trail at all times and are responsible for the actions of their crews and pacers. Littering results in immediate disqualification. Each runner must be checked in at every aid station; entrants who withdraw must inform aid station personnel and turn in their race bibs to avoid being classified as lost.

Headphone use is not recommended and is allowed at each runner's own risk. Visit the organization's website for the most recent information.

Events nearby

Third edition backyard race at Rohr Park in the San Diego area on Nov 14, 2026; smooth hard-packed trail, dog-friendly, with car camping available.
Orienteering in Presidio Park on November 14, 2026 with Motala Beginner, Intermediate and Advanced courses, electronic punching, a two hour time limit and a 75 person entry limit.
A no-frills trail event at Torrey Hills Park on 11/26/2026 featuring 5K and 10K courses, a mid-course waterfall view, cupless running, and virtual options.
Half, 10K and 5K out and back trail races at Black Mountain with dirt courses and hill climbing; limited to 300 runners on November 28, 2026 in San Diego.
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