Lisa Smith-Batchen was the first American to win  Marathon des Sables a six day marathon that spans how long of a distance?
Marathon des Sables Marathon des Sables, or MdS, (French for Marathon of the Sands, also known as Sahara Marathon) is a six-day, 251 km ultramarathon, which is approximately the distance of six regular marathons. The longest single stage (2009) is 91 km long.
Krissy Moehl Kristin "Krissy" Moehl (born October 27, 1977) is an American ultramarathon athlete who specializes in trail running. In 2005, Moehl became the youngest woman to complete the Grand Slam of Ultrarunning, which included a gold medal at the Vermont 100 Mile Endurance Run. She set the women's record for the Hardrock Hundred Mile Endurance Run in 2007. Moehl has won several ultramarathons, including the Ultra-Trail du Mont-Blanc in 2003 and 2009, the Wasatch Front 100 Mile Endurance Run in 2004, and the Ultra-Trail Mt. Fuji in 2013. Krissy Moehl published a book "Running Your First Ultra: Customizable Training Plans for Your First 50K to 100-mile Race" in November 2015. She is the race director for the Chuckanut 50k in Fairhaven, Washington.