Regular Season and Fall Season: For Opening Days for the spring and fall fishing season, please see the Fish Commission web site at www.fish.state.pa.us. Licenses must be purchased each year and displayed except on amnesty days Minimum trout size which can be caught is 7 inches. Two amnesty days are granted each year. For these regulations and other information, see the PA Fish and Boat Commissions‘ website at www.fish.state.pa.us.