Based on the latest information available, the boat ramp named Bryon Road in Prosser, Washington is a cement boat ramp that is approximately 16 feet wide. This boat ramp services the Yakima River, which is a popular destination for fishing and recreational boating. The river is known for its salmon and trout fishing, and the calm waters make it a great spot for canoes, kayaks, and small motorized boats.

According to the Washington State Parks and Recreation Commission, the Yakima River is classified as a Type III waterway, which means that it is suitable for motorboats with a maximum horsepower of 10. Additionally, all watercraft must be properly registered and have the required safety equipment on board.

It is important to note that conditions at the Bryon Road boat ramp may vary depending on the time of year and weather conditions. It is always best to check with local authorities or the Washington State Parks and Recreation Commission for the latest information and regulations before launching a boat from this ramp.