Based on the latest information available, McKay Creek South boat ramp is located in Oregon and is a concrete boat ramp. It measures approximately 20 feet wide and services the McKay Reservoir, which is a small body of water located in eastern Oregon. The reservoir is open to the public for fishing, boating, and other recreational activities.

According to the Oregon State Marine Board, all types of boats are allowed on the McKay Reservoir, including motorboats, sailboats, kayaks, canoes, and paddleboards. However, there are certain regulations that must be followed, such as having the appropriate safety equipment on board and obeying speed and wake restrictions.

It is important to note that the information provided is subject to change and it is recommended to verify the accuracy with the authorities or official sources before visiting the McKay Creek South boat ramp.