Running The 163-Mile Pan Mass Challenge Course

Cyclists set off on the 163-mile Pan Mass Challenge course from Wellesley Saturday morning, but one man got a head start Friday morning to run the course.

Adam Scully-Power will run for two days straight and hopes to hit the tip of Cape Cod Saturday evening. The 39-year-old says he was inspired to run the race not only to support cancer research, but also to honor the victims of the Boston Marathon bombings.

"I had heard about the Pan Mass Challenge, I thought it was a great venue to do just that: a tribute to the victims of Boston, honor runners worldwide and at the same time raise money for Dana-Farber and cancer research that does tremendous work," Scully-Power said.

Scully-Power's friend David Green, who got him interested in running, ran the Boston Marathon and was nearby when the bombs went off. He was not injured, but snapped a photograph that went viral shortly after the FBI released images of the two suspects.

Green not only captured the smoke and confusion in the moments after the explosions, he captured "suspect No.2," later identified as Dzhokhar Tsarnaev, running from the scene. He texted that photo to Scully-Power that afternoon. (See the full size image here.)

Scully-Power says he will stop along the course occasionally for 10 minute breaks to "mentally regroup" and eat. "The plan is to go straight through without stopping and sleeping and get to Provincetown by Saturday night."