We’ll visit Sempervirens Falls, hike up Slippery Rock, where the Sempervirens Club camped on their founding night, and see some of the grandest old-growth groves in the park during this 4-mile, 3.5 hour moderate hike. Along the way we’ll learn how early 20th century conservationist citizens recognized the threats to the redwood forests, which led them to organize, rally the public, and lobby the government to save the redwoods—an ongoing campaign. Bring water and lunch and be prepared for some mud—they don’t call it Slippery Rock for nothing! Meet at park headquarters. Free event. Vehicle day use fee is $10. For more information, call (831) 338-8883.