The 56-year-old Santa Rosa man who died Wednesday while cycling in Annadel State Park had ridden the park's trails for three decades.
Stanley Joseph Stawasz, a veteran printer who enjoyed both cycling and motorcyling, died of an apparent heart attack, his family said Friday.
The Sonoma County Coroner's Office conducted an autopsy Friday to determine why Stawasz collapsed Wednesday afternoon near the juncture of Marsh and Canyon trails in the park.
"He was doing what he loved when he died," said Brian Summers of Santa Rosa, Stawasz's brother-in-law. "He knew every trail by heart."
Stawasz rode in Annadel three or more times a week and "was in as good a shape as you could be," Summers said.