Fall Backyard Burn Trail Running Series - Lake Fairfax

Get ready to hit the trails at the Fall Backyard Burn Trail Running Series - Lake Fairfax, taking place on Sunday, October 18, 2026, in Reston, VA. This popular event offers challenging and scenic 5-mile (one lap) and 10-mile (two laps) distances through Lake Fairfax Park's extensive trail network. Runners will navigate a course that is almost entirely singletrack, featuring stunning views of the lake and minimal pavement. While not overly technical, the trails include a few sections with rocks and roots, along with enjoyable short ups and downs rather than extended climbs. Expect an elevation gain of approximately 300 feet for the 5-mile course and around 600 feet for the 10-mile course. The race is known for its well-marked course and "awesome" aid stations, with plentiful post-race food, including breakfast burritos, awaiting finishers.

The Lake Fairfax course, an "instant hit" and "crowd pleaser" since its addition in 2013, is celebrated for being both fast and fun. It's part of the well-established Fall Backyard Burn Trail Running Series, a favorite among local trail enthusiasts. Typical race day conditions in mid-October offer comfortable highs around 68F and lows around 46F, with only a 14% chance of precipitation, providing an ideal setting for a crisp autumn run. The race starts and finishes near Canopy Pavilion G, where participants can enjoy an electric atmosphere and great music. Adding to the community spirit, the event proudly partners with Homestretch, a local non-profit, offering runners an opportunity to support families in need. For parents, a unique "Little Fern Learning Kid's Program" provides engaging activities for children during the race.