Competitors, volunteers and spectators will stand in silence at the start of Sunday's Marathon of the North, to remember the victims of the Boston bombings.
The tribute was announced by the event founder and organiser Steve Cram.
He said the race safety plan has been reviewed in the light of the Boston attacks as the security of participants is paramount but said he didn't anticipate problems.
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This is your guide to all 37 seats in the North East and North Yorkshire.
The constituency of Selby and Ainsty is a largely rural North Yorkshire seat between York, Harrogate and Pontefract.