Jon and I began our run from the Massachusetts border at 6:12 AM on 2/27 and dipped our feet in the Atlantic ocean at 1:50 AM on 2/28, making our time 19h38m for the entire 78-mile North South Trail. We approached this run without having any previous experience on this trail, and lost our way several times because of it, adding a fair amount of distance overall (we estimate running a total of ~87 miles with a total overall time of 20:33, including the approach to the trailhead). This was a fully supported run. Resurfacing injuries and lots of backtracking slowed us down considerably. Overall, we found the NST to be an incredibly scenic, interesting and varied trail.
Read a full report on Jon's blog: jonharrisons.blogspot.com/2012/03/88-miles-north-south-trail-and.html
Also, check out a video summary of the run: www.youtube.com/watch?v=B0wLTK72xZA&feature=youtu.be