A Shoalwater boat can run in extremely shallow water, often just a few inches deep. Shoalwater's catamaran and flats hulls use a tunnel design that lets them float and run where most boats would run aground, with many owners reporting runs in 4 to 6 inches of water or even less. That shallow-water ability is the whole reason anglers and guides choose a Shoalwater, since it opens up skinny flats and backcountry spots full of redfish and trout. How shallow any Shoalwater runs depends on the model, the load, and how the engine is set up, but getting skinny is what these boats are built to do.