PHOTO BY WAYNE BERNINGER Mid-May sunset at Niobrara State Park at the confluence of the Niobrara and Missouri rivers on Nebraska’s northeastern border. The word “niobrara” comes from the Ponca language meaning running waters or wide waters. Twenty-one tribes are a part of the history of the Niobrara River Valley and consider the area sacred. The Niobrara National Scenic River boundary begins just 10 miles south of and across the Nebraska state border from Rosebud Sioux Tribal Lands in South Dakota. The Niobrara gives its name to the Niobrara Convocation, a gathering of Native Episcopalians from North Dakota, South Dakota, Wyoming and Nebraska which has taken place every year since 1870.