Mountains-to-Sea Trail 50K Challenge

Mountains-to-Sea Trail 12M & 50K Challenge

The Mountains-to-Sea Trail 12M & 50K Challenge is a trail running event held in Durham, North Carolina, that follows single-track sections of the Mountains to Sea Trail along the Eno River toward Falls Lake. The 2026 edition is the 17th annual running of the race. The start and finish are located at Riverside High School.

The event offers two distances:

• 12 mile
• 50 km

Course notes and logistics: the race is held on single-track hiking trails with natural obstacles such as roots, rocks, logs, and occasional water crossings. Aid stations are placed approximately every 3 to 4 miles and are stocked with water, electrolyte drink, energy gels, snacks, and basic first aid supplies. The 50 km aid stations include additional snacks and fruit. Restrooms and porta-johns are available at the start and finish and at the 50 km turn-around. Drop bags are provided for 50 km runners and will be available at the turn-around and finish; 12 mile participants may leave a bag at the finish in a designated area.

Race policies and awards: the event will be cupless and requests that participants carry their own hydration device. All finishers receive a finisher award; additional awards are given to the top three overall finishers and top masters finishers in each race. Course maps are being updated for 2026 due to construction at Blue Jay Point County Park and will be posted when available. Packet pickup is available the day before at Bull City Running South Durham and on race morning at the race start. Visit the organization's website for the most recent information.