From the website:
Gregory is located at the junction of US Highway 18 47 in south central South Daktota. Gregory, South Dakota is perhaps best known for it's pheasant population. Our Pheasant Park is a unique attribute that attracts many visitors year round. The Gregory area boasts glorious hunting opportunities and a long list of recreational activities. For boaters and campers, the Missouri River is only a mere 30-minute drive away.