From www.wdwinfo.com

Changes coming to the 2014 Walt Disney World Marathon Weekend
Apr 10, 2013

Changes are coming to the 2014 Walt Disney World Marathon Weekend that should make the experience a little better for the runners. In addition to the new Dopey Challenge and the new 10K race, the number of registered runners has been reduced so runners will have more room on the course. Runners will be asked for proof of their times so they can be divided into corrals with runners of similar times. There will be more corrals, with fewer people in each, so runners will be more evenly spread throughout the course. The last change is the addition of women's cut tech shirts for runners instead of just having the men's cut available. Registration for these events is now open.