Zoom Lens: Understanding Differential with Jr. Mushers

Welcome to Yentna Station 10-hour Rest Stop

When mushers arrived at the halfway point of the Jr. Iditarod, they rested for ten hours plus their start differential.  To explain that, bib #14 was the last person to start so no time was added to his ten-hour rest.  Bib #13 had 2 minutes added…  all the way up to Bib #2 who had 24 minutes added.  This equalizes the trail time based on teams starting at two minute intervals so the first team that arrives at the finish line is the winner.  The math that was done at Yentna station started with recording the arrival time.  Ten hours was added to the Yentna arrival time and two minutes for each starting position was added to that.

#14 Andrew Nolan is Ready to Depart at 0405

Andrew Nolan came in at 18:05 (military time to avoid AM & PM).  Adding ten hours comes to 04:05.  Andrew was the final musher to start so no start differential was added.  Colby Spears came into Yentna ahead of Andrew at 17:51.  Adding ten hours for rest brings his time to 03:51.  Because Colby was the first musher of thirteen out of the start a differential time of 24 minutes is added to Colby’s rest.  Colby could leave Yentna at 04:15.

Chandler Wappett, wearing bib #12 came into Yentna at 18:43.  To account for rest and differential, 10 hours and 4 minutes are added to his arrival time to determine his out time – 04:47.  Iditarod adds the start differential to the required 24 hour rest.

#12 Chandler Wappett ready to leave Yentna at 14:47