FREE. Docent-led, learn about the redwoods, people, plants, and animals. Saturdays and Sundays. Starts 10 a.m. (1-2 hrs.) Armstrong Redwoods. Meet-up picnic tables in the front parking lot. 17000 Armstong Woods Rd., Guernville. Registration required to have a headcount: tinyurl.com/5n8ds6e9.