The victim was traveling on the two-lane road between Triangle and Independent Hill when he lost control of his bike and hit a tree about 2:53 p.m., said Prince William police spokesman Jonathan Perok.
The victim is identified as 59-year-old Elijah Alexander Byrd of the 4600 block of Kentwood Lane in Dale City.
He was taken to a local hospital following the crash and was pronounced dead.
Police say speed appears to be a factor in the crash.
