The challenge has a goal of raising $100,000 by the end of October, and Sunday's event in Westport netted about $30,000, the nonprofit organization said.
The idea is for teams of volunteers to collectively run the distance of a marathon -- 26.2 miles -- and teams around the world will be running during October.
Staples High School students have been approaching local businesses for donations to an Oct. 23 run by Staples students. Organizers said each participant in that event would run a half mile, or two laps around the Staples track.
The Staples effort is being spearheaded by the school's Save the Children Club, which had raised about $3,400 as of Monday..
The club said businesses may donate to the Staples effort by sending checks payable to "Save the Children" to the club's advisor. They should be addressed to: Marjory Palmer, Room 3020, Staples High School, 70 North Ave., Westport, CT 06880
Westport-based Save the Children said it expects 50,000 kids around the globe would participate in the marathon challenge, including 12,000 in the U.S.
Save the Children says it is the leading independent organization assisting children in need, with programs in 120 countries, including the United States.
To sponsor a school or club, go to www.WMC.savethechildren.org