The trails are well marked and not so long that our kids did much complaining. You can explore both the seaside as well as the hill environments with spectacular views and sites. On the one side of the park, you can watch for sea lions as well as sea otters and - if you're in luck, even see whales in the bay.
On the other side of the park you can wade into shallow tidal pools teeming with different types of mollusk, algae, etc.
In between, you get to get face to face with beautifully twisted pine trees, some apparently up to 300 years old. And there is a small, original whaler's hut that gives you some insight into the Abalone trade (and more).
Excellent for everyone that can hike up sometimes steep or root-riddled paths.