Over the last five years, Mattapoisett’s Rob Grant has run 10 marathons, nearly all for a cause greater than himself.

On May 3, Grant will take his 11th 26.2-mile journey at the Pittsburgh Marathon in support of Damien’s Food Pantry in East Wareham.

“They provide food for the needy,” Grant said of Damien’s, which is located at 3065 Cranberry Highway. The pantry provides food to hundreds of families all over the South Coast area. “It seemed like a good thing to keep the money local.”

Before Grant embarks for the Steel City, Cosi in Wareham Crossing will host a charity night for Grant and Damien’s. From 5 to 9 p.m. on April 30, Cosi will donate 10 percent of its proceeds to Damien’s Food Pantry. Grant will also have a booth with information on how to help Damien’s and a “wish list” of items the food pantry needs.

“Sometimes I get people who come and say ‘I’ve been thinking of volunteering my time somewhere,’” Grant said. “So it’s usually a good community event.”

Grant met Father Gabriel Healy, co-founder of Damien’s Food Pantry, after moving to Mattapoisett in September 2013 and has run his last three marathons in support of the food pantry.

Before 2013 Grant lived in Miami Beach, but has summered in Mattapoisett since 1979. A runner as a young man, Grant trained for a marathon in college but got injured before he could attempt the 26.2-mile race.

In 2010, at the age of 41, Grant took nine months to slowly build up his weekly mileage to nearly 60 miles a week and train for the 2010 Miami Marathon.

For that race, Grant raised $3,000 for the Christian Foundation for Children and Aging. He said he has raised close to that amount in his subsequent marathons.

Grant has run marathons in Miami, Massachusetts, Minnesota and Montreal. This will be his first time in Pittsburgh, and he’ll be thinking of everyone who supported him along the way.

“You have to realize you’re in it with everybody else and just tell yourself you’re almost there,” he said, describing his mindset when the race gets tough. “I’m going to focus on the finish line and that glorious feeling you can’t describe at the finish.”