The Bull Run Run is a 50 mile run hosted by the Virginia Happy Trails Running Club, held the first weekend of April during the height of Virginia’s spring beauty. The race is held on trails that parallel the Bull Run and the Occoquan River along the Fairfax and Prince William county line in Northern Virginia. The course traverses forested, rolling terrain. Less than 1% of the course is on asphalt. The remainder is generally single-track dirt. There are a handful of small stream crossings, particularly in the first out-and-back section of the race course. Most of the trails drain well, but historically this early spring race has at least some muddy sections, and much more so in wet weather. While certain very short sections are rocky, and the trail can offer a few roots and other challenges, the trail is, on the whole, not technical in nature.
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