Tylosurus Acus



Lake, River

2 - 40 pounds

13" - 39"

Brown Trout

Also Known As: Salmo Trutta

Guides Who Fish This Species

Brown Trout (Salmo Trutta)  Description

Brown Trout are a medium-sized premier cold-water game and sport fish. It has been introduced in suitable environments globally and is considered the backbone of many fisheries. These fish have brown or golden-brown backs and a yellowish or white belly. The back and sides are covered with black spots. Head and tail are sometimes spotted. There is a small reddish or orange adipose fin near the tail. Brown trout can be distinguished from similar salmon by their vomerine teeth.

Brown trout is similar to Brook trout, Chinook salmon, Coho salmon, and Rainbow trout. 

Size and Weight

The average size for this fish is 8-24 inches but can grow up to 39 inches depending on the habitat. They can weigh from 1 – 9.5 pounds. 

Interesting Facts 

The Brown Trout live for 12 years but can have an extended life span of up to 18 or 20 years.

Brown trout can be found on almost every continent except Antarctica and many can be found living in the ocean.

They are stocked in 45 states as it's a popular game fish. They are self-sustaining in 34 states.

The Brown Trout is a Guidesly employee favorite to catch on a run!

Distribution and Habitat

Brown Trout Fish United States Fishing Heatmap

Brown Trout prefers to live in covers and cool, clear, and calm waters. A temperature of 54°F to 65°F is ideal for these fishes but can survive up to 75°F. Sea trout travel to brackish or ocean waters and return to freshwater for spawning. Found in small streams, large rivers, and any trout stream with the right water temperature, aquatic insects, and clean water. This species is usually restricted to freshwater, though a few migrate to the sea between spawnings.

Widely distributed, the Brown Trout can be found throughout 45 states and Canada.


The spawning season for these fish starts in fall and early winter.  River trout look for a head riffle or a freshwater stream to spawn. The site is dug by the females, where the eggs are laid and covered with gravel. Hatching occurs in spring. 


Brown trout consume aquatic insects, salamanders, frogs, worms, crustacean mollusks, and other fish. In the sea, they eat alewives and other small fish. 

Fishing Techniques - How to Catch Brown Trout

During the fall season, Brown Trout feed aggressively at night. They can be found in deep pools, overgrown vegetation, or hiding near rocks. Many anglers recommend fishing for them near piers, while others only consider fly fishing in streams. For fly fishing, dry fly or crawfish imitation can be used. A fly rod of 9 ft. length and 5 weight will wield for excellent results. They can use a line of 4-6 weight. 

On the Great Lakes, trolling is an ideal option, or small spinners or baits can be used under a floater. Popular baits and lures used are streamers, woolly bugger, pheasant tail nymph, crayfish, and green caddis.