This year, the New York Marathon organizers are attempting something unprecedented – encouraging all participants to raise money for charity, with the goal of one million dollars for each mile of the course. With over 45,000 runners participating, there are a wide range of worthwhile charities being supported, so we wanted to do our part to urge these runners on. This weekend, when runners using RunKeeper unlock the special New York Marathon badge, a donation will be made to support Camp Interactive – a not-for-profit organization that empowers inner-city youth through the inspiration of the outdoors and the creative power of technology.

Any RunKeeper user who completes the course will unlock the new badge and help a great cause. Here’s how you do it: just add the NYC Marathon to your RunKeeper races, link your RunKeeper account to foursquare, and track your marathon on your iPhone or Android. Here at foursquare HQ, we’re cheering for our founders Dennis and Naveen to make it (they’re each fundraising individually for Camp Interactive). And if you want to watch, track RunKeeper users live on their site, or grab a spot along the route and cheer on the charitable runners.