Great event - note, it's 100kms not the 111kms.
My Garmin has given me distances of 99.9 kms in my ocean ski and 100.9 on the SUP.
They also have a shorter event this year finishing at Wisemans Ferry which is 60kms.
The finish line in 2014 - 100kms in 12 1/2 hours on 14' x 25"