The Big Horn River is a well known flyfishing mecca. Located in southern Montana, the "Horn" is home to large rainbows and is famous for its hard-fighting browns. This river may have the highest population of 20+ inch fish in the US, with the average trout right around 18 inches. The river boasts of 3,000- 4,000 trout per square mile, although the river is finally starting to return to its glory days of 7,000 fish per mile. Most people fish the river from a drift boat, but good fishing can also be had wading. The trout tend to congragate in the deeper holes in the first 3 miles below the dam, but fish can be found throughout the river.