District Department of Transportation Bicycle Program
This website discusses bike safety in the District, provides bike route maps and explains Mayor Fenty's Bicycle Master Plan.

Washington Area Bicyclist Association
WABA represents over 7000 area cyclists who see bicycling as a solution for the traffic, health and environmental challenges in the DC community. The site includes commuter routes, rules for bikes on public transit, a list of bike clubs, and a guide to local bike laws.

DC SmartBike Program
Washington DC's self-service public bike rental program

Bike Washington
Resource for area recreational trials and bike routes.

Map My Ride for DC
List of more than 600 cycling routes in DC.

CycleLife USA
Georgetown retail store, bicyclists' club, and advocacy organization.

MPD Bicycle Enforcement Scenario Document (PDF)
Depicts common enforcement errors involving bicycles as well as the relevant regulations to support that claim.