Doomsday 5k - Oakville, MO
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Doomsday 5K - St. Louis, MO
The Doomsday 5K is a trail race held on January 1, 2027 in Cliff Cave County Park, St. Louis, Missouri. The event is presented by Terrain Trail Runners and is listed with an online registration price of USD 65.45 and a race day registration option at USD 70 cash.
The course is a 5K with approximately 272 feet of elevation gain. The route begins and ends on pavement for roughly one half mile each way and uses the Spring Valley Trail Outer Loop for about 1.8 miles. Spring Valley Trail is an all-dirt trail with rolling hills, roots, and rocks. The organizers describe the trail as beginner friendly.
Registration closes on Sunday, December 27 at 11:59 PM CT. The event participates in the Trail Mix Fund, which can cover registration fees for eligible runners. Family and youth discounts are available, and the organizers offer hardship assistance for those who cannot afford entry fees. Children must be registered to be on the course; there are specific instructions for minor registrations that require using the Register as a Guest option to assign each child correctly.
Included with online registration are a choice of a cotton t shirt, a pint glass, or an opt out to plant a tree, and all finishers receive a custom medal. Awards include credits for top male, female, and non binary performers. The event follows a cup free sustainability policy so participants should bring their own mug and mess kit for post race coffee and snacks, which are provided for runners and volunteers only. Visit the organization's website for the most recent information.
