SALEM — A few thousand motorcycles will descend on the city Sunday for an annual charity ride.
The 21st annual Halloween Witch Ride, a benefit for the Muscular Dystrophy Association, is scheduled to arrive in the downtown between 1:30 and 2:30 p.m., according to police.
A spokeswoman for the MDA said the exact number of riders won't be known until Sunday. However, an estimated 3,000 people rode in last year's event and the same number is expected this year.
The event raised $55,000 in 2008.
Sponsored by Bruce Rossmeyer's Boston Harley-Davidson in Everett and the Boston HOG (Harley Owners Group) chapter, the 30-mile ride starts at the Everett motorcycle dealership and travels through Revere, Lynn, Swampscott and Marblehead.
It enters Salem from Lafayette Street, goes past Salem State College and ends at Shetland Park on the waterfront.
Derby Street between Lafayette and Congress streets will be closed when the riders arrive. Police said motorists should be prepared for "extensive traffic delays."
This year's event is the first since the death of Rossmeyer, who was killed in July in a motorcycle accident in Wyoming.
"It will be a tough year without him," said Megan McDonough, a spokeswoman for MDA.