Return back to one of the dwarves with the trophy to claim your prize

Talk to Sinister Stranger (a vampire contestant you’ll have to buy luminary gold beat). Ask him all the questions and then talk to Bonzo to begin the competition. Return back to one of the dwarves with the trophy to claim your prize. Summing it up:

1) – Talk to one of the 2 Mountain Dwarfs in either the shack west or east of White Wolfs Mountain. Ask about the Fishing Competition. He’ll give you the Competition pass.

2) – Acquire 3 red vine worms at McGrubor’s Wood (use a spade on the red vines).

3) – Head south of McGrubor’s Wood in to Hemenster. Open the gate to the fishing spots and show your Competition pass to the guard.

4) – Ask the Sinister Stranger about the sun, the fishing spot, and about him being a vampire. Afterwards, talk to Bonzo to begin the contest.

5) – Place a Garlic in the pipe next to the vampire. The sinister will then move to another fishing location. Use your fishing rod on the fishing spot next to the pipe to catch a couple of carps. Bonzo will hand you the winner’s trophy after you have caught around 3 carps.

6) – Take the trophy back to the dwarf to complete this quest.