By Mail HQ, Missouri National Recreational River P. O. Box 591 O'Neill, NE 68763
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Missouri National Recreational River P.O. Box 666 Yankton, SD 57078
By Phone Headquarters NPS: 402-336-3970 Visitor Information NPS: 402-667-2550
By Fax 402-667-2552
Did You Know?
Yankton, on the Missouri River, was the first capital of Dakota Territory. This area included the states of South Dakota, North Dakota, Montana, Wyoming, and parts of Idaho and Nebraska.