Two-mile self-guided hike. Groups of 9 (must be in the same social pod). No dogs permitted. COVID-19 guidelines followed. $10 per person. No one turned away for lack of funds. Saturdays. 9 a.m.–2 p.m. Hikers must arrive by 10 a.m. Hopland Research & Extension Center. 4070 University Rd., Hopland. Register online by 2 p.m. day before hike. bit.ly/hrechike.