A group of local runners (myself included) completed South to North on May 28th (and some of the 29th) 2016. The heat of the day obliterated us but we wanted to get it done so we stretched it out over 16:45 or so. If it wasn't the first real hot run of the year it would have been much quicker.
I figured I'd add it here because I didn't see something listed for S to N specifically, possibly to spur some interest. We ran every step together, the party also included two female companions Annie Gagliardi and Alexandra Brinkert.