Hisse'yoyi'yoe

Hisse'yoyi'yoe lies near the headwaters of the Niobrara River in eastern Wyoming. West of Lusk the young river begins among open plains, and its upper channel can be dry for long stretches. The North Fork, also called Duck Creek, comes from shallow swales north of Lusk before joining it farther east. The Niobrara grows into a longer river as it crosses Nebraska toward the Missouri.