$7 parking fee or Sonoma County Regional Parks Pass displayed on vehicle dash.
It's easy to see where Blackberry Trail gets its name. Along the trail, you'll have views towards the middle of the park and the marshes and fields. There are some oak groves where you can birdwatch as well as observe some mistletoe eating away at the trees.
At the beginning of the trail, there is a peace garden with a spectacular sculpture created by world-renowned artist, Masayuki Nagase.