On-leash dog welcome for a 2.3-mile walk around Spring Lake. Goodies from various pet-friendly vendors; socialize with your fellow pet lovers. $35 pp. Ages 10 and under: Free. (Registration still required for ages 10 and under.) 9 a.m. Spring Lake Regional Park. 5585 Newanga Ave., Santa Rosa. Tickets: tinyurl.com/4dfayhea.