Reference article
White Tufted Duck
White Tufted Duck is a local rival who offers a race in Glacier.
Challenge
Speak to this duck in 
Glacier to enter 
White Tufted Duck’s Race. The entry requirement is Flying level exactly 0.
Dialogue
I don't know how to fly. I'll only race you if you don't either! There's no flying in my race. I just don't like people who have more skills than me...
Race guide
See White Tufted Duck’s Race for the course and rewards.