BOSTON -- Trek USA, a group of runners that began a cross-country marathon in San Francisco, reached their final destination in Boston Tuesday.

Video

Mike Dowling Reports On Trek TrekUSA.org

NewsCenter 5's Mike Dowling reported that the proceeds from the run will go to area charities, including The Jimmy Fund, The Cam Neely Foundation for cancer research and The Doug Flutie Autism Foundation.

The 10-runner relay team began their 3,333-mile cross-country trip 25 days ago in San Francisco. The team ran through the deserts of Nevada and Utah and the mountains of Colorado on a mission to save lives, literally.

"We were at this motel and, I think in Colorado, and this guy went down and in the lobby of the motel and I just did what I was trained to do," said runner Dr. Hap Farber.

For the 55-year-old doctor, that was CPR.

For team member and Boston Marathon Race Director Dave McGillivray, the timing of the event was perfect.

"I had a baby girl right before we left on the trek. My wife was a team player because she had the baby after the Boston Marathon and before the trek so I could be there for the birth," said McGillivray.

On Tuesday, the runners gathered in Hopkinton to begin the final leg of their run -- the course of the Boston Marathon.

"We have 26 miles left. It is great to be able to finish it on the original Boston Marathon course then run to Fenway. It is going to be an emotional experience for me because it was 25 years ago when I did this and ran into Fenway, and I never thought I would get the chance to do it again, and here we are," said McGillivray.

McGillivray will throw out the first pitch before Tuesday's Red Sox game against the Oakland Athletics.