Bill Iffrig of Lake Stevens, Wash., says he will wear the same orange singlet he wore during the Boston Marathon.
Iffrig told The Spokesman-Review that he was nearly at the finish line in Boston when the first of two homemade bombs exploded.
The 78-year-old fell to the ground. A volunteer came up, followed soon after by three police officers. Photos of that scene appeared on websites and newspapers around the world.
He says the aftermath of the explosion has left him with a sore quadriceps muscle, which slowed his training schedule.