Human remains found near the Petaluma River were those of an adult woman, said Petaluma police Wednesday.
Official identification still awaited a check of dental records, said Petaluma Lt. Tim Lyons.
Her bones were found early Friday morning. They were on a remote section of undeveloped land on a peninsula stretching into the Petaluma River near downtown.
A transient boater told police he'd heard there could be a body near the McNear Peninsula and officers found scattered bones at about 2:30 a.m.
How the woman died also remained under investigation but Lyons said nothing has been found to suggest foul play.