Tired of tackling marathons and ready to take on a bigger fitness challenge? If you consider yourself an ultrarunner (as in, running 20 miles a day doesn't make you woozy just thinking about it!), then you could be the perfect fit for The MS Run the US 2013 Relay, taking place April 16 through September 17, 2013. But don't worry; you don't have to tag along for the whole thing! The relay will cover approximately 140 miles per runner over the course of six days to raise funds and benefit The National MS Society for MS research, a disease that affects 400,000 Americans. The course, starting in Los Angeles, CA and ending in NYC will mimic the 2010 trans-continental run the event's founder, Ashley Kumlien, ran on behalf of her mother's 30th anniversary of her fight against MS. There are currently 14 Running Partner spots still open for various cities, so if you're interested, visit msruntheus.com for more information and an application. Not quite up for the challenge? Check out the page to see how you can donate or volunteer when the relay comes to your town.
Now tell us: Have you ever done a run for charity? Which one?