Even though they are hardier than rainbows, browns still require and prefer clear cold waters, and most actively feed when water temperatures range from 50 to 60 degrees. Because the brown trout feeds a great deal on the surface they have become very popular with flyfishermen. The stocky brown is a bulldog fighter when hooked, occasionally leaping out of the water. Fishing for browns is best on overcast days, in early morning before the sun is up, and at night. On bright days fish are more often found in the shade of undercut banks or overhanging vegetation.
Browns commonly feed on mayfly and caddisfly nymphs, grasshoppers, worms, crayfish and minnows.
The brown's varied diet enables anglers to employ some of the same methods used to catch rainbows. However, at Oklahoma's Mountain Fork River designated trout area, fishing in some areas is restricted to artificial flies and lures with barbless hooks only. Fish near large rocks and logs and in deep holes. A special trout license is required for everyone fishing in a designated trout area. Trout tend to seek out and congregate in calm waters.