License requirements: People age 16 and older need a license to fish. People age 15 and younger may fish with out a license for half the limit and any age may keep a full limit with a valid license. The fine for fishing without a license is $68 with additional charges for each unlawful fish and other violations. Purchase licenses at Lee's Texaco, Fox Creek Store, Mrs. Rio's, Rocky Mountain Lodge, Skyline Lodge, and the Lodge at Platoro. Except for active military personnel, resident licenses require proof of 6 months in state residence. Here is the current license fees from the Colorado Division of Wildlife.