Requirements: Fishing Contest Sign-up Ticket (can get in fishing in Heyang)
Time: Start from 6pm- 7pm only
1. Go to the Traveling Fisherman in Heyang (123,144) you can exchange those into Dragon Den Stone Marrow.
2. Go to Torrent Village near to the isle southeast of bridge (-210,107).
*Refer to the yellow shaded in the map*
*Note*
Fishing Contest in only in channel 1-5
Fishing rod is only visible every fishing time
You can only exchange sign-up ticket once a day
Right click the Dragon Den Stone Marrow (bait) before choosing the rod
Source: DigitalRequisites.com