J, race took me 1:20 last year in the 4s, but that was in the lead group and many took much longer. Not sure about the 5s.
Last year they had only planned 2 cat 5 fields and added a third at the last moment, but they were all back-to-back.
It's good that they planned for a third field, and interesting that they are leaving such a big time gap, I wonder if it is intentional to allow people to do a second.
I looked this morning and there were 68 in the A field, 6 in the B field and 15 in the C field. Pretty sure there can only be 50 in each so they will have to redistribte.