Capital Bikeshare is celebrating its third birthday.
The bike-sharing service now has more than 200 stations in the district, and in nearby Arlington and Alexandria, Va., where members can rent the company's red bikes.
To celebrate, Bikeshare will hold a trivia contest via Twitter. Contest participants can win gift cards and annual membership prizes.
Capital Bikeshare is also one of the participants in Friday's Park(ing) Day, with more than 20 District of Columbia parking spaces are being turned into temporary parks. Capital Bikeshare's park is near the company's station at 7th and F streets NW.