Nation: Labor Day.
Oakwood Lakes State Park near Volga: Free nature day camp for ages 7-12 on mammals. Park is 10 miles northwest of Volga off U.S. Highway 14. Reservations are required by calling the park at 605-627-5441.
South Dakota: Youth deer hunting season opens through Jan. 15.
Nation: Grandparent's Day.
Nation: Citizenship Day.
Black Hills: 14th annual Mickelson Trail Trek. Details: MickelsonTrail.com or 605-584-3896.
South Dakota: Grouse season (sharp-tailed grouse, prairie chickens and ruffed grouse) opens through Jan. 2. Details: gfp.sd.gov.
South Dakota: Partridge season opens through Jan. 2. Details: gfp.sd.gov.
Bismarck: National Guard FLW Walleye Tour Championship and Outdoor Expo on Missouri River. Details: 270-252-1000 or FLWOutdoors.com.
Nation: Fall begins.