A little hectic at the start but it soon sorts itself out. The strong and experienced open water swimmers pull out ahead right from the beginning and mostly maintain this pace throughout.
Some get clear of the pack and find their pace by themselves whilst others stay in a group.
What really surprised me was how closely the top swimmers stayed together after such a long race. It really was a fight to the end!
Boats patrol the lake and watch for swimmers that miss the buoy turn or who may need some help. I only witnessed one or two cases of this.