Mermaid Marina Boat Ramp provides semi-private access to Kentucky Lake (Tennessee River) at mile marker 140 in Decaturville, with a full-service marina offering boat slips (accommodating vessels up to 250 feet), fuel, and a restaurant overlooking the river.

The facility is managed by the Tennessee Wildlife Resources Agency and features 135 total slips with 14-foot dock depth, making it suitable for various boat sizes and recreational activities.