As winter settles in, trout on the big reservoirs begin to drop deeper, feed more selectively, and respond best to slower, more deliberate presentations. Cold water and reduced surface activity mean it’s the season for subtle buzzers, small fry patterns, and low-key lures fished at measured pace on intermediate or sinking lines. With fish often moving between mid-water and the depths, having a well-chosen winter fly selection can make all the difference — here are some of the patterns most likely to keep you catching through the colder months.