Barbless.coBarbless.co
  • Home
  • Map
  • Reports
  • Guides
  • Fish
  • Hatches
  • Podcast
Sign in
Barbless.co

The more you understand, the more there is to see.

  • IdahoLive
  • CaliforniaSoon

Explore

  • Map
  • Reports
  • Browse reports
  • By region

Waters

  • River search
  • Guides & outfitters

Learn

  • Fish species
  • Hatches & forage
  • Podcast

Company

  • About
  • Contact
  • Editorial policy
  • Releases
  • Legal

© 2026 Barbless.co. Flow and gauge data from USGS; weather from Open-Meteo. · v2026.10.18.2

  1. Home
  2. Fish
  3. Bass & panfish
  4. Smallmouth Bass

Updated September 26, 2026

← Back to map
Smallmouth Bass: fish species profile

Fish › Bass & panfish

Bass & panfishCentrarchidaeGNR · ESA: Not listed · Idaho: SNA

Smallmouth Bass

Micropterus dolomieu

An introduced warmwater brawler that hammers lures around rock, current seams, and river structure.

Overview

Size range

3–27 in

Size range

3–27 in

Size range

Typical adult length in the waters we cover.

Water temperature

Warmwater

Water temperature

Warmwater

Water temperature

Preferred thermal regime for this species.

Active season

Late spring through fall

Active season

Late spring through fall

Active season

When anglers most often encounter this species.

Origin

Introduced

Origin

Introduced

Origin

Stocking and native history where this species is found.

Habitat

Lowland & Warmwater, Rivers & Large Rivers, Lakes & Reservoirs

Habitat

Lowland & Warmwater, Rivers & Large Rivers, Lakes & Reservoirs

Habitat

Primary water types where this species is found.

About Smallmouth Bass

Smallmouth bass are an introduced species in Idaho and are established in several river and reservoir fisheries. They are prized by anglers for hard strikes, strong runs, and their knack for holding around current breaks and rocky cover.

Also known as: smallies, smallmouth

Smallmouth Bass Silhouette

  • Smallmouth Bass species silhouette
    Primary

Behavior

spawning
Spawns in shallow areas; anglers commonly find fish associated with nearshore structure during the spawning period.
feeding style
Young feed on plankton and immature aquatic insects; adults are aggressive predators that key on crayfish, fish, and aquatic and terrestrial insects, sometimes taking prey off the bottom around rock.
seasonal notes
Most active in warmwater conditions, especially when fish slide into shallow rocky areas, gravel-bottom runs, flowing pools, and reservoir structure to feed.

Habitat

water types
rivers, reservoirs, lakes, cool streams
preferred holds
Look for shallow rocky areas, clear gravel-bottom runs, flowing pools, and reservoirs or river sections with rock, current breaks, and other hard cover.

Where Found

Blue Ribbon waters

  • Smallmouth bass in some reaches

    Clearwater River

    Present in some reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Bayhorse Recreation Site to Tappan

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Cache Bar to Carey Creek

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Campbell Flat to Pine Bar

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Carey Creek to Riggins

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Colston Creek to Shoup Bridge Campground

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Corn Creek Campground to Spring Bar

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Deadwater Spring to Corn Creek Campground

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Hammer Creek to Mouth / terminus

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Headwaters to Sawtooth Kids Pond

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Lucile Recreation Site to Campbell Flat

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Maynard Hole to Hammer Creek

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Riggins to Maynard Hole

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Sawtooth Kids Pond to Sunbeam

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Shoup Bridge Campground to Tower Rock Recreation Site

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, South Butte to Bayhorse Recreation Site

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Spring Bar to Lucile Recreation Site

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Sunbeam to South Butte

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Tappan to Colston Creek

    Lower, warmer reaches

  • Smallmouth bass in lower/warmer reaches

    Salmon River, Tower Rock Recreation Site to Cache Bar

    Lower, warmer reaches

Recommended waters

  • Smallmouth bass

    Bear River, Alexander Reservoir to Eightmile Road Bridge

  • Smallmouth bass

    Bear River, Bear Lake Outlet to WY State Line

Smallmouth Bass on the podcast

  • Nick Torres Bass Aficionado living in troutlandia

    Episode 177 · May 9, 2022

    Nick Torres Bass Aficionado living in troutlandia

    Listen on the Barbless Podcast

  • Captain Bryce Tedford - Stripers, Smallmouth, Largemouth, and moving to California

    Episode 174 · Jan 24, 2022

    Captain Bryce Tedford - Stripers, Smallmouth, Largemouth, and moving to California

    Listen on the Barbless Podcast

  • Dominic "Dom" Bruno microchip, glass lens, Magician of Wade Deep Media

    Episode 179 · Aug 29, 2022

    Dominic "Dom" Bruno microchip, glass lens, Magician of Wade Deep Media

    Listen on the Barbless Podcast

Diet

Adults feed heavily on crayfish, baitfish, and aquatic or terrestrial insects.

  • BaitfishInferred
  • CrayfishInferred
  • GrasshopperInferred
  • LeechInferred
  • SculpinInferred

Angler Tactics

tactics
Target current seams, eddies, rock piles, riprap, and points. Cover water until you find active fish, then slow down with jigs or plastics around the best rocky structure.
effective methods
crankbaits, spinnerbaits, soft plastics, jigs, topwater lures, crayfish imitations

Regulations

Always check the current Idaho fishing seasons and rules for the specific waterbody before fishing, as bass limits and special provisions can vary by location.

Regulations vary by water. Check current Idaho Fish and Game rules before fishing.

Conservation

Status: Introduced to Idaho

GNR · ESA: Not listed · Idaho: SNA

Explore fish

Browse species profiles with habitat, diet, tactics, and linked waters across the state.

Browse all fish

On this page

OverviewSilhouetteBehaviorHabitatWhere FoundFrom the PodcastDietAngler TacticsRegulationsConservation

Share & plan

IDFG Planner

On this profile

  • 40 waters
  • 5 food sources
  • 1 photo

Smallmouth bass

Bear River, Cove Plant to Grace Dam

  • Smallmouth bass

    Bear River, Eightmile Road Bridge to Georgetown

  • Smallmouth bass

    Bear River, Georgetown to Bear Lake Outlet

  • Smallmouth bass

    Bear River, Grace Dam to Last Chance Dam

  • Smallmouth bass

    Bear River, Last Chance Dam to Alexander Dam

  • Smallmouth bass

    Bear River, Oneida Narrows Dam to Cove Plant

  • Smallmouth bass

    Bear River, Preston to Riverdale

  • Smallmouth bass

    Bear River, Riverdale to Oneida Narrows Dam

  • Smallmouth bass

    Boise River, Mouth to Middleton

  • Smallmouth bass

    Clark Fork River

  • Smallmouth bass

    Owyhee River

  • Smallmouth bass

    Payette River

  • Smallmouth bass

    Saint Maries River

  • Smallmouth bass

    Snake River, American Falls Reservoir to Gem Lake Dam

  • Smallmouth bass

    Snake River, Hells Canyon Dam to Clearwater Confluence (Lewiston)

  • Smallmouth bass

    Snake River, Swan Falls Dam to Brownlee Reservoir

  • Smallmouth bass

    Spokane River