Fall Backyard Burn Trail Run - Lake Fairfax
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Event overview
The Fall Backyard Burn Trail Run - Lake Fairfax is scheduled for Sunday, October 19, 2025, at Lake Fairfax Park in Reston, VA. The event is produced by EX2 Adventures and offers two distance options:
- 5.1 miles (1 lap)
- 10 miles (2 laps)
Registration includes an opportunity to support the local non-profit Homestretch. A multi-race bundle is available that offers a 10% discount per event for participants who enter multiple races in the series.
Course and race information
The course is almost entirely singletrack with minimal pavement. The 5.1 mile lap has about 300 feet of elevation change; the 10 mile option totals about 600 feet. There are some short technical sections with rocks and roots and many short ups and downs, but no extended climbs.
Race operations include aid stations, medical support, post-race food, awards and giveaways. Awards are given to the top five finishers in each category. Race rules note that in-ear headphones are not permitted, pets, pacers and baby strollers are not allowed on course, race numbers must be visible, outside assistance is only permitted within 50 meters of an aid station, and racers must stay on designated trails. A supervised kids program is offered by Little Fern Learning with a short kids race; pre-registration and a program fee apply. Visit the organization's website for the most recent information.