Thanks for the reply. There is more info in the web site,
http://bataanmarch.com/The 26.2 miles goes around the White Sand Missile Base. The route was selected to be more difficult, and does go over many miles of soft sand.
It is held in New Mexico because: In 1942 the Americans who surrendered to the Japanese forces were Army, Army Air Corps, Navy, and Marines. Among those were members of the 515th and 200th Coast Artillery, New Mexico National Guard. Many died in the force death march of some 60 miles.
I do not have any personal connection to this historical event. As a avid reader of World War II stories, this event has left an indelible psyche. During the 2014 JMT hike, early on sick, tire, and hungry the story of these military men, and the hardship that they endured on the march lend a great deal of inspiration for me to continue and survive the JMT hike.