For those seeking a congenial spot to cheer on the runners:
"Potomac Runners will have its own wild and well-caffeinated cheering section at Mile 24 on Crystal Drive in Crystal City, one block from a free public parking garage and across the street from three coffee shops. Free public parking at 2451 Crystal Drive, if you do not plan to bike over or take Metro. Hope you can make it to cheer on all the runners, beginning around 9:45 AM. The actual meeting place is near 23rd Street and Crystal Drive across from Caribou Coffee, Starbucks, and Cosi."