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Smallmouth Bass: Size, Record, Habitat and How to Catch Them

Smallmouth bass identification, typical size, the 11 lb 15 oz IGFA record, where they live, spawn timing by state and the lures and live bait agencies recommend.

Wade CallahanPublished Oct 26, 2026 · Updated Oct 26, 2026 · 5 min read
Illustration of a smallmouth bass with dark vertical bars along a green body and a red eye
Smallmouth bass (Micropterus dolomieu), illustrated by Duane Raver. Photo: Duane Raver, U.S. Fish and Wildlife Service, Public domain

Smallmouth bass

Typical size
10–20 in, 1/2–4 lb (Missouri); 12–16 in average (Washington)
Water temp
Spawn at about 60 °F (53–75 °F across sources)
Best months
Missouri: Apr–Jul, peak May · Wisconsin: mid-May–Jun · Lake Erie, NY: Apr–late Jun
Top baits
Crayfish and crayfish-pattern crankbaits, Tube jigs, Topwater poppers, Spinnerbaits
Rig
3–4 in stickworm on a 1/8–1/4 oz jig head (New York)
Line (lb test)
8–10 lb mono on a 6.5–7 ft medium spinning rod (New York)

Seasons, size and bag limits and licenses vary by state and water. Check your state agency, for example New York State DEC

How to identify a smallmouth bass

A smallmouth is green with dark vertical bands and no horizontal stripe (Texas). Washington describes it as mottled with dark vertical bars. The mouth is the dependable mark: the upper jaw never extends past the eye (Texas, New York), reaching only to about the rear margin of the eye (Missouri). In Oklahoma’s words, the smallmouth’s mouth hinge lines up in front of the back edge of the eye.

Missouri notes the two dorsal fins are connected, and Alabama counts 9 to 11 dorsal spines and 13 to 15 rays. For a full side-by-side with the largemouth, see smallmouth vs largemouth bass.

Where smallmouth bass live

Smallmouth want clear, clean, rocky water.

  • Streams: Missouri finds them in clear streams with silt-free rock and gravel, near riffles but out of the main current. Virginia describes oxygenated, cool gravel-bottom streams and says the species is intolerant of siltation, warm water and pollutants.
  • Lakes and reservoirs: Texas lists large clear lakes over 100 acres and over 30 feet deep. Oklahoma points to clear reservoirs with rocky bottoms, and Alabama to rock outcrops, logs, treetops and riprap.
  • Depth: New York finds them around rocky areas in 5 to 35 feet of water.

Adults prefer fish, crayfish and frogs, and young fish eat small invertebrates (Virginia). Iowa found forage fish in 40 percent of stomachs, crayfish in 30 percent and insects in 20 percent, with crayfish over two-thirds where they are abundant. Washington calls signal crawfish the favourite food.

When to catch smallmouth bass

Spawning starts as the water nears 60°F, but the date shifts with the state.

Smallmouth bass spawn timing by state
StateJFMAMJJASOND
MissouriEarly or mid-April to June or July, above 60°FNot in season: JanuaryNot in season: FebruaryNot in season: MarchIn season: AprilPeak: MayIn season: JuneIn season: JulyNot in season: AugustNot in season: SeptemberNot in season: OctoberNot in season: NovemberNot in season: December
AlabamaApril to May at 59 to 63°FNot in season: JanuaryNot in season: FebruaryNot in season: MarchIn season: AprilIn season: MayNot in season: JuneNot in season: JulyNot in season: AugustNot in season: SeptemberNot in season: OctoberNot in season: NovemberNot in season: December
IowaEarly May, above 60°FNot in season: JanuaryNot in season: FebruaryNot in season: MarchNot in season: AprilIn season: MayNot in season: JuneNot in season: JulyNot in season: AugustNot in season: SeptemberNot in season: OctoberNot in season: NovemberNot in season: December
Wisconsin (southern)Mid-May through June at usually 62 to 64°FNot in season: JanuaryNot in season: FebruaryNot in season: MarchNot in season: AprilIn season: MayIn season: JuneNot in season: JulyNot in season: AugustNot in season: SeptemberNot in season: OctoberNot in season: NovemberNot in season: December
WashingtonLate May to June at 60°FNot in season: JanuaryNot in season: FebruaryNot in season: MarchNot in season: AprilIn season: MayIn season: JuneNot in season: JulyNot in season: AugustNot in season: SeptemberNot in season: OctoberNot in season: NovemberNot in season: December

in season · peak

Spawn temperature sources also include Texas and Virginia (approaching or surpassing 60°F) and Oklahoma (60 to 75°F). Nests sit over gravel, about 2 to 4 feet deep in Virginia, 5 to 20 feet in Washington and 3 to 20 feet over Oklahoma gravel bars.

Best seasons

  • Spring: Washington says fishing improves through spring and peaks at the spawn. New York’s Lake Erie fishery is best from April to late June.
  • Summer: Washington reports a lull, though dawn and dusk can be very good, and fish rest below the thermocline in 20 to 30 feet by day. Wisconsin names June just after the spawn as the best lake fishing. New York says mid-June to the end of August at 60 to 75°F. Oklahoma says the best fishing is late spring through early fall, above 60°F.
  • Fall: Washington says the bite improves, and Wisconsin names early fall.
  • Winter: Virginia fish sit in winter holes in December and January and are lethargic from late December to February. If you go, fish from noon to about 4 p.m.

Oklahoma notes smallmouth stay under cover by day and prowl the shoreline in the morning and evening.

How to catch smallmouth bass

By season

  • Early spring: crankbaits and suspending jerkbaits for lethargic fish (Washington).
  • Spring: crankbaits, jerkbaits and spinnerbaits, plus grubs on a football jig and drop-shot finesse worms (Washington). On Lake Erie tributaries in April and May, New York names stickbaits, crankbaits and minnow imitations. On reefs in late May and June it lists tube jigs, twister tails, deep-diving stickbaits, spinnerbaits and crankbaits.
  • Dawn and dusk: spinnerbaits, soft jerkbaits and poppers (Washington). Wisconsin says surface baits are probably the best artificials, and Oklahoma lists walk-the-dog lures, poppers, buzzbaits and frogs.
  • Summer, deep: drag soft plastics or fish drop-shot finesse worms (Washington). In 20 to 40 feet on Lake Erie, New York uses jigging spoons, blade baits, spoonbill jerkbaits, tube jigs, soft plastics and live bait.
  • Winter: a 3 to 4 inch swimbait on a 1/8 ounce jig head, slow-rolled, or tubes fished ned-rig style (Virginia).

Live bait

Wisconsin names hellgrammites, dragonfly larvae and crayfish in the early morning and late evening. Alabama fishes live bait or bounced jigs in the Wheeler tailwater.

Soft plastics and spinners

For Oklahoma streams, use 1.5 to 3 inch soft plastics on a 1/32 to 1/16 ounce jig head, with green pumpkin as a starting colour. Oklahoma also lists crankbaits and jerkbaits in shad, bluegill and crayfish patterns and 1/8 to 1/4 ounce inline spinners in green, brown, black or white. For big fish in deep holes it uses 3 to 5 inch soft plastics on 1/8 to 1/4 ounce jig heads. New York’s go-to in deep clear water around rocks is a 3 to 4 inch stickworm on a 1/8 to 1/4 ounce mushroom jig head. Iowa pairs light spinning gear with crayfish-coloured crankbaits. For more lure ideas, see best bass lures.

Rod and line

New York names a 6.5 to 7 foot medium spinning rod with 8 to 10 pound monofilament as its bass go-to, and Wisconsin simply says light tackle.

Size and the IGFA record

Missouri puts typical fish at 10 to 20 inches and half a pound to 4 pounds, with a maximum of about 22 inches and 6 pounds. Washington averages 12 to 16 inches, with 16 to 24 inches in quality populations. On Lake Erie most are 2 to 4 pounds and 5 to 6 pounds is possible (New York). Streams run smaller: Oklahoma’s Neosho and Ouachita strains rarely exceed 14 inches.

The IGFA all-tackle record is 11 pounds 15 ounces (5.41 kg), caught by David Hayes at Dale Hollow Lake on the Tennessee and Kentucky line on July 8, 1955. State records include New York’s 8 pounds 4 ounces from Lake Erie and Washington’s 8.75 pounds from the Columbia River on April 23, 1966.

Rules

Limits vary by state and water. Check your state agency before you fish, such as New York State DEC or the Washington Department of Fish & Wildlife. For month-by-month timing across bass species, see the best time to fish for bass.

Frequently asked questions

What is the world record smallmouth bass?

The IGFA all-tackle record is 11 pounds 15 ounces (5.41 kg), caught by David Hayes at Dale Hollow Lake on the Tennessee and Kentucky line on July 8, 1955.

How big do smallmouth bass get?

Missouri lists 10 to 20 inches and half a pound to 4 pounds as typical, with a maximum around 22 inches and 6 pounds. Iowa treats anything over 3 to 4 pounds as a trophy.

How can I tell a smallmouth from a largemouth?

Check the jaw. On a smallmouth the upper jaw does not extend past the eye, according to Texas and New York agencies, and Missouri says the two dorsal fins are connected.

What temperature do smallmouth bass spawn at?

Most agencies put it at about 60°F. Wisconsin says usually 62 to 64°F, seen as low as 53°F, and Oklahoma gives a range of 60 to 75°F.

What do smallmouth bass eat?

Adults eat fish, crayfish and large aquatic insects (Missouri). Oklahoma adds worms, frogs and tadpoles, and Washington says signal crawfish are a favourite.

Sources

  1. Smallmouth bass, Texas Parks and Wildlife Department
  2. Smallmouth bass (Micropterus dolomieu), Washington Department of Fish & Wildlife
  3. Smallmouth bass field guide, Missouri Department of Conservation
  4. Smallmouth bass, Outdoor Alabama (ADCNR)
  5. Smallmouth bass field guide, Oklahoma Department of Wildlife Conservation
  6. Smallmouth bass stream angler guide, Oklahoma Department of Wildlife Conservation
  7. Fishing for largemouth and smallmouth bass, New York State DEC
  8. Lake Erie smallmouth bass fishing, New York State DEC
  9. Smallmouth bass, Virginia Department of Wildlife Resources
  10. Fishing for smallmouth bass during the coldest months of the year, Virginia Department of Wildlife Resources
  11. Smallmouth bass, Iowa DNR
  12. Smallmouth bass, Wisconsin DNR
  13. Greatest records in sportfishing history, International Game Fish Association
  14. Smallmouth bass, Game Fish Database, International Game Fish Association