Hidden between the Bull Run Marina and Fountainhead Regional Park lies a biking trail that promises not just to challenge but also to exhilarate. A ride here is a roll through rooted ascents, 4x4 step-ups, and rocky terrains; it's a trail that dares you to excel.
Those expecting a smooth, flowy ride might want to recalibrate expectations. This trail isn't the place to coast; it's a site where your mettle as a mountain biker will be tested. The trail is laced with technical features like water-bars and plenty of roots that make for a challenging yet rewarding experience. Riders have found the trail particularly gnarly when tackled in the opposite direction—from Fountainhead towards Bull Run Marina—owing to the added challenge of steeper climbs.
Weekends often see a flux of hikers, and as this trail was hikers-only until recently, sharing the space courteously is key. Those eyeing a more solitary biking experience should aim for weekdays. The trail conditions can vary significantly depending on the weather. Recent visits suggest that the trail remains largely dry, although changes in weather can impact this considerably.
To hit the trail, you can either start at the parking lot near Bull Run Marina or at Fountainhead Regional Park. Both ends offer ample parking spaces and are well-connected. However, seasoned riders often recommend starting at Fountainhead for a more challenging ascent and a rewarding downhill journey.
Not a trail for the faint-hearted or the inexperienced. But if it's a challenge you seek, with a combination of rooted climbs, rocky patches, and technical descents, the Bull Run-Fountainhead trail will not disappoint. The 12-mile out-and-back journey will put your skills to the test, offer a substantial workout, and leave you with a sense of accomplishment that few trails in the Fairfax Station area can provide.
10 mi 
