Massanutten Mountain Trails 100 Mile Run

MAY

16

2026

This 100-mile trail ultra traverses the rocky, rugged Massanutten Mountains in Virginia with over 18,000 feet of climb. Known for its well-stocked aid stations, the May event avoids the worst summer heat. Registration opens with no lottery and has defined refund deadlines.

Sat 16 May 2026

Fort Valley, Virginia

Website Registration

100 miles

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Course and Terrain

The Massanutten Mountain Trails 100 Mile Run (100 Miler) is a trail ultra on a demanding, rocky course in the Massanutten Mountains of Virginia's Shenandoah Valley. The route includes short but rugged mountain climbs, with a total elevation gain of over 18,000 feet.

Aid Stations and Logistics

The event is noted for its well-stocked and friendly aid stations. Course marking is provided. The May date typically avoids the region's intense summer weather, though rain and storms have occurred in prior years.

Registration and Refunds

Entry opens on October 31, 2025, with no lottery. There are specific deadlines for partial refunds: Visit the organization's website for the most recent information.

A $25 fee is deducted for withdrawals before March 1, 2026.
A $100 fee is deducted for withdrawals before April 16, 2026, provided there are at least 250 entrants and a waitlist. No deferrals or bib transfers are allowed. Registration closes on April 29, 2026.