(MD) (Potomac Riverkeeper) Join us on an all-women’s paddle in support of clean water!  The paddle will launch and head up Four Mile Run, a scenic urban tributary of the Potomac River located just south of Arlington. Spend your morning enjoying an easy out and back flat-water paddle up four-mile run – perfect for soaking up some sunshine, admiring the scenery with views of the DC skyline, meeting other clean water enthusiasts from the area, and celebrating the 50th anniversary of the Clean Water Act!