When is smallmouth bass season in South Dakota?

South Dakota keeps smallmouth bass open to fishing year-round for the 2026 regulation year — there is no closed season, though the daily bag and size limits below still apply every day.

What is the South Dakota bag limit for smallmouth bass?

The South Dakota daily bag limit for smallmouth bass is 5 / day combined black bass (largemouth + smallmouth). The possession limit is 10 in possession. Some named waters set a different limit — check the water-body overrides above.

What size smallmouth bass can you keep in South Dakota?

The South Dakota size rule for smallmouth bass is No statewide minimum (including on the Missouri River reservoirs); 15 in min on Lake Mitchell + Lake Yankton; 14–18 in protected slot on New Wall Dam. Trophy rule: Lake Oahe + Lake Sharpe + Missouri River main stem trophy smallmouth corridor; SD state-record smallmouth 7 lb 5 oz Lake Oahe 2008 (one of larger smallmouth on the Northern Plains tier outside Great Lakes + Northeast); free-flowing Missouri River reaches between reservoirs underrated smallmouth river fisheries.

Do you need a license to fish for smallmouth bass in South Dakota?

Yes. South Dakota requires a valid fishing license to fish for smallmouth bass, with the usual exemptions for young children, state free-fishing days, and some senior or disabled-veteran categories. A license is valid only in the state that issued it, so non-residents need a South Dakota license — compare resident and non-resident South Dakota fees on the state regulations page below.

Are there gear restrictions for smallmouth bass in South Dakota?

Yes. In South Dakota, smallmouth bass fishing carries these gear rules: Hook-and-line; trolling permitted; Snagging prohibited for black bass; SD Fishing Licence required for anglers 18+ ($31 res / $80 NR annual); Habitat Stamp ($10 res / $25 NR) also required at 18+; Confirm current-year SDGFP Fishing Regulations for trophy waters list.

Do specific South Dakota waters have different smallmouth bass rules?

Yes. 8 named South Dakota waters carry rules that override the statewide smallmouth bass regulation, including Lake Oahe, Lake Sharpe, Lake Francis Case, and 5 more. See the named water-body overrides above for the exact rule on each.

2026 regulation year

South Dakota Smallmouth bass 2026 — Season, Bag Limit, Size Rules

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Last updated June 9, 2026

South Dakota smallmouth bass fishery centers on Lake Oahe + Lake Sharpe + the free-flowing Missouri River reaches between the four USACE reservoirs — the rocky shoreline + clear-water + cool-temperature conditions of the Missouri River corridor support naturally-reproducing smallmouth populations on the Northern Plains reservoir tier. Lake Oahe (370,000 acres, the country's fourth-largest reservoir) is the state's premier smallmouth water — Oahe's main-stem rocky shoreline + Cheyenne River arm + Moreau River arm + Grand River arm support naturally-reproducing smallmouth + the quality-management 14-inch minimum reach. SD state-record smallmouth bass 7 lb 5 oz (Lake Oahe, 2008 — one of the larger smallmouth on the Northern Plains tier outside the Great Lakes + Northeast). Lake Sharpe (80,000 acres) carries similar trophy smallmouth on the Big Bend Dam basin + the rocky shoreline reaches near Fort Pierre + the Bad River confluence. Lake Francis Case + Lewis & Clark Lake carry secondary smallmouth populations on listed rocky-shoreline + offshore-structure reaches. The Deerfield Reservoir (411 acres in the Black Hills) carries a stocked smallmouth + cold-water trout mix as one of SD's only Black Hills smallmouth waters. Belle Fourche Reservoir + Big Stone Lake carry secondary smallmouth populations on western + northeastern SD reaches. The statewide standard rule is a 5-fish combined daily aggregate across largemouth + smallmouth bass (10 in possession) with NO statewide minimum length — and there is no bass minimum on the Missouri River reservoirs either. The only bass length rules are quality-management overlays on a few small waters: a 15-inch minimum on Lake Mitchell + Lake Yankton and a 14–18-inch protected slot on New Wall Dam. Open year-round statewide.

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Season

Open year-round Open year-round statewide; March – May pre-spawn + spawn densest fishing window; no spring spawning closure.

Bag & possession

Daily bag: 5 / day combined black bass (largemouth + smallmouth)
Possession: 10 in possession

Size, slot, trophy rules

Size: No statewide minimum (including on the Missouri River reservoirs); 15 in min on Lake Mitchell + Lake Yankton; 14–18 in protected slot on New Wall Dam
Trophy rule: Lake Oahe + Lake Sharpe + Missouri River main stem trophy smallmouth corridor; SD state-record smallmouth 7 lb 5 oz Lake Oahe 2008 (one of larger smallmouth on the Northern Plains tier outside Great Lakes + Northeast); free-flowing Missouri River reaches between reservoirs underrated smallmouth river fisheries

Gear restrictions

Hook-and-line; trolling permitted
Snagging prohibited for black bass
SD Fishing Licence required for anglers 18+ ($31 res / $80 NR annual); Habitat Stamp ($10 res / $25 NR) also required at 18+
Confirm current-year SDGFP Fishing Regulations for trophy waters list

Named water-body overrides

Where statewide rules differ on specific South Dakota waters:

Lake Oahe
5 / day combined, no minimum length; SD state-record smallmouth 7 lb 5 oz Oahe 2008
Lake Sharpe
5 / day combined, no minimum length; trophy smallmouth alongside Oahe
Lake Francis Case
5 / day combined, no minimum length
Missouri River main stem
5 / day combined, no minimum length; free-flowing reaches between reservoirs underrated smallmouth river fisheries
Lewis & Clark Lake
5 / day combined, no minimum length; joint NE/SD boundary under Missouri River Boundary Compact
Mitchell Lake
15 in minimum, 5 / day combined black bass (quality-management overlay over the no-minimum statewide rule); Davison County at Mitchell
Lake Yankton
15 in minimum, 5 / day combined black bass; a Missouri River backwater below Gavins Point Dam, Yankton County
New Wall Dam
14–18 in protected slot — keep only bass under 14 in or 18 in and longer (one over 18 in), 5 / day combined; Pennington County prairie stock-dam

Official source

South Dakota Game, Fish and Parks (SDGFP) publishes the authoritative 2026 South Dakotafishing regulations. Always verify the current rule before fishing — emergency closures and in-season changes can override what's published here.

Visit official South Dakota fishing regulations →

Emergency-order channel

Smallmouth bass closures, slot-limit changes, and harvest pauses are posted to South Dakota Game, Fish and Parks's emergency-order feed — check it before any South Dakota trip during the active season.

Frequently asked questions

When is smallmouth bass season in South Dakota?: South Dakota keeps smallmouth bass open to fishing year-round for the 2026 regulation year — there is no closed season, though the daily bag and size limits below still apply every day.
What is the South Dakota bag limit for smallmouth bass?: The South Dakota daily bag limit for smallmouth bass is 5 / day combined black bass (largemouth + smallmouth). The possession limit is 10 in possession. Some named waters set a different limit — check the water-body overrides above.
What size smallmouth bass can you keep in South Dakota?: The South Dakota size rule for smallmouth bass is No statewide minimum (including on the Missouri River reservoirs); 15 in min on Lake Mitchell + Lake Yankton; 14–18 in protected slot on New Wall Dam. Trophy rule: Lake Oahe + Lake Sharpe + Missouri River main stem trophy smallmouth corridor; SD state-record smallmouth 7 lb 5 oz Lake Oahe 2008 (one of larger smallmouth on the Northern Plains tier outside Great Lakes + Northeast); free-flowing Missouri River reaches between reservoirs underrated smallmouth river fisheries.
Do you need a license to fish for smallmouth bass in South Dakota?: Yes. South Dakota requires a valid fishing license to fish for smallmouth bass, with the usual exemptions for young children, state free-fishing days, and some senior or disabled-veteran categories. A license is valid only in the state that issued it, so non-residents need a South Dakota license — compare resident and non-resident South Dakota fees on the state regulations page below.
Are there gear restrictions for smallmouth bass in South Dakota?: Yes. In South Dakota, smallmouth bass fishing carries these gear rules: Hook-and-line; trolling permitted; Snagging prohibited for black bass; SD Fishing Licence required for anglers 18+ ($31 res / $80 NR annual); Habitat Stamp ($10 res / $25 NR) also required at 18+; Confirm current-year SDGFP Fishing Regulations for trophy waters list.
Do specific South Dakota waters have different smallmouth bass rules?: Yes. 8 named South Dakota waters carry rules that override the statewide smallmouth bass regulation, including Lake Oahe, Lake Sharpe, Lake Francis Case, and 5 more. See the named water-body overrides above for the exact rule on each.

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