 This race has become very popular in recent years and as a result, until 2010, hopeful participants must have been picked in a lottery to have an opportunity to participate.However, due to the increased capacity at Camelback Ranch, in 2011 the lottery was removed and registration was once again offered to all on a first-come, first-served basis.Founded in 1983 by Harold Sieglaff, the race has changed over the years in location as well as organization.