According to the latest information available, Murphy Lane Park County boat ramp is located in Montana at latitude 45.3668251 and longitude -110.72553253. It is a concrete boat ramp that is approximately 16 feet wide. This boat ramp services the Yellowstone River, which is a popular destination for boating, fishing, and other recreational activities.

The Murphy Lane Park County boat ramp is suitable for small to medium-sized watercraft. It can accommodate motorized boats, canoes, and kayaks. However, there are restrictions on the use of motorized boats on the Yellowstone River. Boats must not exceed a maximum speed of 35 miles per hour, and they must be equipped with appropriate safety gear, such as life jackets and fire extinguishers.

Overall, the Murphy Lane Park County boat ramp provides a convenient access point to the Yellowstone River for boaters and other water enthusiasts. Its concrete construction and relatively wide width make it an ideal choice for launching and retrieving small to medium-sized watercraft.