Fall Backyard Burn Trail Run - Lake Fairfax
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Event details
The Fall Backyard Burn at Lake Fairfax is scheduled for Sunday, October 19, 2025, at Lake Fairfax Park in Reston, VA (1400 Lake Fairfax Drive). The event is produced by EX2 Adventures and offers two distance options:
- 5.1 miles (one lap)
- 10 miles (two laps)
Elevation gain is listed as 300 feet for the 5-mile course and 600 feet for the 10-mile course. Finish medals are available as an optional add-on; series finishers who complete all five races receive a special medal.
Course and race information
The course is almost entirely singletrack with a short prologue and very little pavement. There are some short technical sections with rocks and roots, and the route features many short ups and downs rather than extended climbs. Aid stations are provided; outside assistance is only allowed within 50 meters of an aid station.
Race rules include no in-ear headphones, visible race numbers worn on the front, no pets, pacers, or baby strollers on course, and a requirement to stay on designated trails. There are no cut-off times. Awards are given to the top five in each category. Age divisions are Male, Female, Non-Binary: 12-U, 13-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70-79.
A morning kids program is offered in partnership with Little Fern Learning for ages 2-11; it includes nature activities, STEM projects, and a short kids race. Pre-registration is required. Cost details: $55 for the first child, $45 for a sibling, with multi-date discounts available. Visit the organization's website for the most recent information.