A man was fatally injured in an accident while being towed on an inflatable tube kite on Little St. Germain Lake, authorities said.
The man sailed several feet into the air and then hit the water, suffering fatal head and chest injuries, officials said.
He struck the water around 8 p.m. Monday and died five hours later at a hospital, officials said. It appeared that he hit only the water, conservation warden Mike Sealander said.
The Vilas County Sheriff's Department identified the victim Tuesday as Gregory Bykowski, 42, of Delafield.
He was riding on a tube kite, which is an inflatable platform towed by a boat. It skims across the water and can become airborne.
An autopsy was planned.