Bicycling magazine's October issue includes their bi-annual ranking of the top 50 Bike Friendly Cities and Washington, Arlington and Alexandria all did pretty well. Oddly the Washington Post ignored the Virginia cities and instead focused on the surprise choice of New York City as #1.
Washington came in 5th, which is pretty good, but was actually down from 4th in 2012. Arlington rose to #19, from #23 in 2012. Alexandria cracked the list for the first time at #31. Once again, no city in Maryland made the list. Here's historical rankings for area cities.
2014 - #5
2012 - #4
2010 - #13
2014 - #19
2012 - #23
2010 - #30
Back in 2008, the magazine didn't use number rankings, but DC was named one of the most improved cities. And in 2006, they only ranked the top 3 in each group of cities by size. None of the area cities many any of the list. Before that, you're on your own.