49-year-old Kyle Marc Aaron Matteson of Jensen Beach died Saturday after crashing the 1999 Yamaha ATV he was driving.
Matteson was traveling northbound along the west side of the Florida East Coast Railroad's right of way in Jensen Beach.
According to FHP, he steered the ATV sharply to the left and in doing so the vehicle overturned.
Matteson was trapped underneath the vehicle.
The time of the crash is unknown.