Peter Bakwin lowered the time to 18h43m22s on December 2-3, 2006 (report). Charles Corfield started the run with Bakwin, but was stopped at 50 miles due to a foot injury. Charles has completed the loop on 4 occasions since then, in December 2007 (don't know the time), March 2008 (19h51m), December 2008 (19-20h), and December 2013 (don't know his time). On two of his trips Charles carried a GPS and measured the total distance at 99.79 and 99.81 miles, respectively. Justin Snow measured the route at 99.95 miles by a GPS carried on his mountain bike in April 2009.
18h 43m 22s