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Terrible Twelve

Name: Terrible Twelve
Start: 2025-08-23
End: 2025-08-24
Location: Williamsburg

Williamsburg, United States • 23-24 Aug 2025

The Terrible Twelve is a 12-hour endurance running event held at the Warhill Nature Trail in Williamsburg, Virginia. Participants run or walk as many 3.7-mile loops as possible from 7 PM to 7 AM on a crushed gravel trail featuring rolling hills. Unique to this race, each runner must volunteer for one hour during the event to support others by cheering, cooking, or counting laps.

The race is self-supported, encouraging participants to bring their own supplies and share food. The atmosphere is communal and challenging, with awards and T-shirts recycled from past races, making it a memorable and gritty experience for trail runners. Visit the organization's website for the most recent information.

United States Virginia Williamsburg

Race information

Website Registration

12 hr

12 Hour Race

Visit the organization's website for the most recent information.

Trail runs nearby

Tue - Sat Jun-Jul 16-18

Trailzilla at Sandy Bottom Nature Park

A three-race summer trail series at Sandy Bottom Nature Park organized by the Peninsula Track Club, featuring 5K, 4-mile, and 5-mile events plus a full-series entry and awards across age groups and walker categories.

Saturday Jun 27

Night Owl 9K

Williamsburg

9 km

Night Owl 9k at Freedom Park in Williamsburg VA is a night trail race over single track, fire road and paved trails with rolling hills and technical sections. Post race activities include pizza, beer and wildlife education.

Saturday Jul 11

Windsor Castle 10-Hour

Smithfield

5 km

A manually timed trail event at Windsor Castle Park in Smithfield, VA, run on a 3.1-mile loop with 10 hour, 5 hour, 2 hour and a one-lap 5k formats; aid station and rucking options are available.

Saturday Oct 10

Frightening 4 Trail Run/Hike

Toano

4 mi

A Halloween themed 4 mile trail run and hike at York River State Park on October 10, 2026. The new trail features single track, river views and rolling hills, with finisher medals for all and a two hour time limit.