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.
Watch Helen Ford's report here:
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The total number of cases in the region rose by 20 between Friday and Sunday including one cardiac arrest.
North Yorkshire Police say the collision occurred on Sunday February 7 on the A64 at Low Moorgate in Rillington.