Organizers say hundreds of thousands of bikers and spectators gather every Memorial Day weekend for the Rolling Thunder "Ride for Freedom." The event got its start in 1988 and it honors military veterans and members of the military missing in action.
Bikers rally at the Pentagon all morning Sunday, then cross the Memorial Bridge at noon and cruise around the National Mall.
Drivers throughout the region should watch out for a large number of motorcyclists on the roads all weekend and watch for road closures associated with Sunday's rally.
In New Mexico, Taos County Sheriff Jerry Hogrefe said the event in Red River will have a sizable contingency of New Mexico State Police officers along extra U.S. Forest Service patrols.
He said the rally will have around 50 officers a day from different agencies patrolling the area to the Colorado border until Memorial Day and will be "extra vigilant" in spotting potential problems.