Grand River Country Duck Migration Forecast

Lemmon and the west river prairie. Stock dams and creek bottoms, thin water that fills only in a wet year.

Season dates: South Dakota duck season 2026-27, dates and migration timing

When Grand River Country peaks

DuckCast’s season model puts the mallard peak here around mid November. Grand River Country carries its own season curve rather than sharing South Dakota's statewide one, because the timing here genuinely differs from the rest of the state. That is a modelled typical curve, not a prediction for any single year. The actual push depends on cold fronts and freeze-up upstream, which is what the daily score tracks. Always confirm season dates with South Dakota Game, Fish and Parks.

What DuckCast watches upstream of Grand River Country

3 upstream stations feed this region's freeze line: Dickinson, Williston, Minot. When those stations ice over, the score here starts climbing before anything changes in the local sky.

Locations stay generalized

Hunter reports for Grand River Country are always shown at the region level. DuckCast never collects or displays exact coordinates, so filing a report here never burns a spot.

Also covered in South Dakota

Prairie Coteau Sand Lake and the Upper James Glacial Lakes Mid James Valley Big Sioux Corridor Lewis and Clark Oahe and the Missouri Cheyenne River and the Hills Live migration map

Season dates and regulations change. Always verify with SD Game, Fish and Parks. DuckCast forecasts conditions, not legal seasons.