Shortcut:
Just after the jump over the stream with the booster panels and the lone booster panel following. At the beginning of the following s-curve instead of going all the way to the right and back to the to left, there is a straight line of light blue shore the runs right through the middle of the ocean, that can be used to skip most of the s-curve.
Coin List:
10 coins - in the middle of the road after the first sharp curve, (to the right).
8 coins - in a straight line on the outer edge, (right side) of the next curve.
5 coins - in a straight line on the left side, after jumping the stream and immediately after the lone booster panel.
6 coins - in a straight line, near the end of the s-curve, on the outer side of the curve to the left.
6 coins - in two straight lines, going horizontally, at the end of the s-curve, (in the middle the road of sharp part of the curve to the left).
6 coins - in two straight lines, going horizontally, in the middle of the road of the u-turn to the right.
9 coins - in three straight lines, before the end of the track and after the jump with the booster panels.
50 coins total