According to the latest information available, the Nena Primitive Launch boat ramp is located at latitude 45.10128693000007 and longitude -121.13047398299994 in Oregon. It is a primitive boat ramp, which means that it is a basic, no-frills ramp without any dedicated parking or facilities. The ramp is reportedly wide enough to accommodate most small to medium-sized watercraft, but exact dimensions are not readily available.

The Nena Primitive Launch boat ramp services the Deschutes River, which is a popular spot for fishing, kayaking, and rafting. It is surrounded by scenic forested areas and offers access to some of the most beautiful stretches of the Deschutes River.

As for the type of craft permitted on the water, it appears that all non-motorized boats are allowed at this location. This includes kayaks, canoes, stand-up paddleboards, and rafts. However, it is important to note that regulations and restrictions may vary based on the season, so it's always a good idea to check with local authorities before heading out on the water.