Delve into forest history—and prehistory—with a 3-mile, 2.5-hour walk to the site of the sawmill and fossils deep inside the redwood forest. Bring water and snacks. Meet at the Porter Picnic Area about one mile past the kiosk. This is a light to moderate hike and is a free event.

The vehicle day-use fee is $8. For more information, call (831) 685-6444. Event made possible by California State Parks and Friends of Santa Cruz State Parks