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Largemouth Bass

Largemouth Bass

Largemouth bass are not native to Idaho but have been successfully introduced throughout the state to provide recreational fishing opportunities.

Idaho's largemouth bass grow slower than those in southern states due to colder water temperatures - it takes four to five years to grow a 12-inch fish and nearly ten years to produce a trophy.

Physical Characteristics:
  • Largemouth bass are apex predators with large mouths that extend past the eye when closed, distinguished from smallmouth bass by this feature and a deeply notched dorsal fin.
  • Females grow much larger than males, which rarely exceed 3-4 pounds.

What to know

Habitat Distribution

  • They are typically found in smaller lakes, reservoirs, and shallow bays of larger lakes where aquatic vegetation provides cover for ambush feeding.

Key Locations

  • Prime Idaho waters include the Coeur d'Alene River chain lakes in the Panhandle, Lake Lowell (considered Idaho's best warm-water fishery), C.J.
  • Strike Reservoir, Crane Falls Lake, American Falls Reservoir, and numerous small ponds throughout southern Idaho.

Specific Spots

  • Focus casting around shallow shoreline areas, points, rocks, brush, fallen trees, vegetation edges, and any cover that provides ambush opportunities.
  • In reservoirs like C.J.
  • Strike, target flooded vegetation and structure.
  • Males build circular nests 12-25 inches in diameter in 3-5 feet of water, typically in protected coves with hard-packed sand or gravel bottoms.

Largemouth Bass FAQ

Answers from onWater's species guide.

What are the best lures and bait for Largemouth Bass in Idaho?

Effective lures include soft plastic worms and jigs, spinner baits, minnow-imitation lures, plastic tube jigs, and crankbaits. Dark colors work best in darker water and cloudy conditions, while lighter colors suit clear water and sunny days.

What flies work for Largemouth Bass in Idaho?

Top fly patterns include popping bugs in bumblebee, frog, and chartreuse patterns for topwater action, Clouser Minnows in white or white/chartreuse for mid-column fishing, Game Changers (5-6 inch feather versions) in white for swimming presentations, and weighted crayfish patterns or dredge flies in olive for bottom...

When is the best time to fish for Largemouth Bass in Idaho?

Spring (April-May) when water temperatures reach the mid-50°F range as they move from deep winter locations to shallow spawning areas. Summer fishing is productive early morning and evening, while winter requires fishing deeper with slower presentations.

How do you catch Largemouth Bass in Idaho?

Fish low and slow during cooler months as bass are less aggressive. Focus casting around shallow shoreline areas, points, rocks, brush, fallen trees, vegetation edges, and any cover that provides ambush opportunities.

What do Largemouth Bass eat?

Adults feed on smaller fish, frogs, crawfish, and virtually anything that moves - they're opportunistic feeders that will consume snakes, birds, mice, and even baby alligators in warmer climates. Young largemouth eat zooplankton and aquatic insects.

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