We used to live in DC just north of Georgetown on Crescent drive area. We would use the CCT for biking, inline skating and running. We mountain biked along the canal on the toe path. The section we used was from the Key Bridge north and we would ride from our house to the Starbucks on Wisconsin Ave. The traffic on that section of the CCT varies in density and composition and sometimes we had to pick our way along or ride behind a walker until it was okay to pass. MUPs are okay for casual riding but they do have their challenges.