FREE. Help remove litter & other debris from Sonoma Creek. 2 sessions: 9–11 a.m. & 10 a.m.–noon. 2 locations: Larson Park. 329 DeChene Ave., Sonoma. Maxwell Farms Regional Park. 100 Verano Ave., Sonoma. Registration required: tinyurl.com/48zbxurt. Info: parks.sonomacounty.ca.gov.