The boat ramp named South Williams Street 12196, Dunnellon is a public boat ramp located in Dunnellon, Florida. It is primarily used to access the Rainbow River, which is a popular recreational area for boating, fishing, and swimming.

The South Williams Street boat ramp is a concrete ramp with a width of approximately 15 feet, which is wide enough to accommodate most small to medium-sized watercraft. The ramp also has a dock for loading and unloading passengers and gear.

According to the latest information available, the South Williams Street boat ramp permits a variety of watercraft, including canoes, kayaks, paddleboards, and motorized boats. However, there may be restrictions on the size and horsepower of motorized boats allowed on the Rainbow River, so boaters should consult local regulations before launching.

Overall, the South Williams Street boat ramp is a convenient and accessible option for anyone looking to enjoy the natural beauty of the Rainbow River in Dunnellon, Florida.