State Highway 20 Spur Southeast 1121 boat ramp in Cartersville, Georgia is a concrete ramp that provides public access to Lake Allatoona. As per the latest information available, the ramp is 12 feet wide and can accommodate single-lane traffic. The body of water it services is Lake Allatoona, which is a man-made reservoir located in the northwestern part of Georgia.

The ramp is suitable for small to medium-sized watercraft such as bass boats, ski boats, and pontoon boats. However, it may not be suitable for larger vessels due to its narrow width. Additionally, it is important to note that all watercraft must comply with the boating regulations and safety laws enforced by the Georgia Department of Natural Resources.

Overall, the State Highway 20 Spur Southeast 1121 boat ramp is a convenient and easily accessible launching point for boaters looking to explore the scenic Lake Allatoona in Georgia.