If anyone is interested, here's the route that was taken during the DC-Rand "Swinging Bridge Century" from last Saturday:

http://www.bikely.com/maps/bike-path/15117

It only shows a cumulative climb of 6,500+ feet, including the ride to and from the ride start. Also, I lost a couple miles plotting the map, as it did not come out to 144.9 miles like my CatEye reported.