at the race of today, and always map 2,
when you swim to bayside:
you got 2 piers there, making a harbor inside of it,
between those 2 big piers there is a little pier,
thats where you need to get up,
you will also see someone helping standing where you need to get up:
BUT! its hard to get up the pier, you might think impossible, but its need perfect timing to get up it,
so it isnt only about going fast