Bicyclists will ride along Riva Road in Anne Arundel County on Saturday morning to honor an Annapolis High School cross-country coach who was killed in a crash in August.

Riders will gather at Annapolis High School, 2700 Riva Road, beginning at 7 a.m. Saturday for the Trish Cunningham Memorial Rally and Ride. A brief program at 8 a.m. will include remarks on bike safety and a moment of silence before the ride begins.

Participants plan to ride down Riva Road and past the site where Cunningham was struck, which will be marked with a white "ghost bike." They'll end at Riva Park, about four miles from the school.

The goals of the ride are to honor Cunningham and raise awareness of safety rules such as the "three-foot law." Under Maryland law, drivers passing a bicyclist must stay at least three feet away from a bike if it's being operated legally.

Cunningham, a 50-year-old mother of three and assistant cross-country coach was riding southbound on Riva Road near Beards Point Road on Aug. 21 when a southbound vehicle struck her. Cunningham died at Anne Arundel Medical Center. The driver of the vehicle was not injured.

The crash remains under investigation, said Justin Mulcahy, a police spokesman. The State's Attorney's Office will review the case, he said.

Memorial ride organizer Alex Pline of Annapolis didn't know Cunningham, but was moved to honor her with a ghost bike, a type of roadside memorial that's a tradition among cyclists. After speaking with Cunningham's family and others, the tribute grew into an event that's expected to draw more than 200 participants.

"It's a way to try to bring whatever good you can out of a tragedy," Pline said.

Police are cautioning drives to expect delays on Riva Road near the high school, Central Avenue, Beards Point Road and Governor Bridge Road during the ride. Police will provide traffic control during the event.

The ride to honor Cunningham is one of two bicycle-safety events in Anne Arundel County this weekend. Anne Arundel County Police will hold an event Sunday on the Baltimore-Annapolis Trail in Glen Burnie.

Police officers with the county's bike patrol unit will lead a two-hour ride on the trail starting at 9 a.m. near Bruster's Ice Cream, 801 Aquahart Road in Glen Burnie. The officers will share tips on bike safety, rules of the road and equipment.