Reference article
Gray Curly Duck’s Race
Gray Curly Duck offers this race in Glacier.
Entering
Click the local rival and select a duck. There is no level requirement to enter.
Course
Mixed course. Ordinary races play automatically; trained skills and sufficient energy determine whether the duck reaches the finish.
Winning
Winning gives you 200 coins the first time you finish first. Once defeated, this rival no longer offers the race.
Progression
Winning supplies the invitation for 
Glacier Tournament.
Rival
This race is offered by 
Gray Curly Duck.
Original Flash note
Some races give different coin rewards in the original Flash game.