Mile Run Trail at Bluemont Park. Name Web pages and other sources sometimes identify the Custis Trail as the "Nellie Custis Trail" or the "Martha Custis Trail". However, no documents show that the trail ever bore the name of any specific individual. In 1980, there were discussions of naming I-66 for the Custis family, to which George Washington was related by marriage. At the time that I-66 was opening east of the Capital Beltway, Virginia highway officials were unofficially calling that section of the road the "Martha Custis Parkway". In 1981, at least one columnist thought the road - and by extension the trail - was being specifically named for Nellie Custis. The section of I-66 east of the Beltway eventually received the name "Custis Memorial Parkway". Several Arlington County documents have therefore identified the trail as the "Custis Memorial Parkway Trail". Notes Transportation in Arlington County, Virginia Bike paths in Virginia Protected areas of Arlington County, Virginia