They say the man collided with something in Indian Slough near Highway 4 and the Old River Bridge at around 4:30 p.m.
A woman riding with him was seriously injured. She was airlifted to John Muir Hospital in Walnut Creek.
They say the man collided with something in Indian Slough near Highway 4 and the Old River Bridge at around 4:30 p.m.
A woman riding with him was seriously injured. She was airlifted to John Muir Hospital in Walnut Creek.