Trout, browns, brookies, and rainbows are coldwater species, so they like cold water and remain active under ice cover. One key to trout location in reservoirs and lakes is finding shallow flats (4 to 8 feet deep) with soft bottoms. Tiny invertebrate foods live in soft bottoms and trout feed on them and the small baitfish they attract. Trout can also suspend off the outside edge of flats. Winter trout can be caught on a variety of baits including micro softbaits, like nymphs, worms, and curlytails, presented on a #8 to #16 hook or 1/64- to 1/8-ounce jigheads.