Flatland skimboarding (also known as inland skimboarding) is a form of skimboarding practiced on non-coastal waters, such as a river, lake, stream or puddle. It uses a wooden board about three times as wide as a skateboard and one and a half times as long. The board is thrown across a thin film of water. While the board is still moving the rider jumps on and skims across the water to perform tricks.