Montgomery County Commuter Services, Commuter Connections and the Washington Area Bicyclist Association will sponsor Bike to Work Day on Friday.
More than 10,000 area commuters are expected to participate. Montgomery County plans to have 17 pit stops for refreshments and chances to win bikes and other prizes.
Cyclists are encouraged to register at biketoworkmetrodc.org. Free T-shirts will be distributed at pit stops to the first 14,000 registered cyclists.
Montgomery County Commuter Services is sponsoring morning pit stops in Bethesda at Woodmont and Bethesda avenues, National Institutes of Health Building One, Naval Bethesda Support Activity, Rock Springs Business Park and the U.S. Nuclear Regulatory Commission. There also is a stop planned for Wisconsin Place in Friendship Heights.
In Rockville, pit stops will be at Fallsgrove Village Center, Rockville Town Center, Tower Oaks and Twinbrook.
This year, the mayors of Rockville, Gaithersburg and Frederick have made a friendly bet on which city has the most registered participants.
Only about 0.5 percent of Montgomery County workers commute by bike, according to census data. But that varies. For example, 4 percent of residents near downtown Bethesda bike to work.