You may not be thinking of cycling just yet, but Spring will be here before you know it. For those of you who enjoy bicycling in the urban environment as well as on the trails, the following course might be of interest to you. This is a course on urban bike riding offered by two "League of American Bicyclists"-certified instructors to be held at the Wright-Dunbar Interpretive Center, 16 S. Williams St., on two Saturdays, April 5 and 12.