Reference article
White Curly Duck
White Curly Duck is a local rival who offers a race in Mountains.
Challenge
Speak to this duck in 
Mountains to enter 
White Curly Duck’s Race. The entry requirement is Flying level 40.
Dialogue
If you want to race me you have to be at least lvl 40 flying I just don't like race people below me. It's not that you're bad, I'm just better than you
Race guide
See White Curly Duck’s Race for the course and rewards.