On-leash dogs welcome for a 2.3-mile walk around Spring Lake. Goodies from various pet-friendly vendors and socialize with your fellow pet lovers. $40 pp. Ages 10 and under: free. (Registration still required for ages 10 and under.) 9 a.m. Spring Hill Regional Park. 5585 Newanga Ave., Santa Rosa. Register: tinyurl.com/yc5wyf38.