 Halibut anglers and Valdez are all trying to catch the derby-winning halibut and take home $10,000 cash. Currently leading the derby is Jeff Smith of Tucson, Arizona, who caught a 160.8-pound halibut. The Valdez Silver Salmon Derby will start Saturday, July 20th with a grand prize of $10,000 cash for the largest fish caught. The Women's Silver Salmon Derby is slated for Saturday, August 10th.