Based on the latest information available, the boat ramp named Valentine National Wildlife Refuge is located at latitude 42.55275345 and longitude -100.61357117 in Nebraska. It is a concrete boat ramp that provides access to the Niobrara River.

The Valentine National Wildlife Refuge boat ramp is approximately 24 feet wide, which can accommodate most types of watercraft. However, it is important to note that the ramp may not be suitable for larger boats, such as houseboats or pontoon boats.

The Niobrara River is a popular destination for recreational activities such as fishing, kayaking, and canoeing. The river is known for its scenic views and clear waters, making it a popular spot for tourists and locals alike. The Valentine National Wildlife Refuge boat ramp is designed to accommodate these types of watercraft, including canoes, kayaks, and small motorized boats.

In summary, the Valentine National Wildlife Refuge boat ramp is a concrete boat ramp located in Nebraska that provides access to the Niobrara River. It is approximately 24 feet wide and can accommodate most types of watercraft, including canoes, kayaks, and small motorized boats.