SOLSTICE CELEBRATION, DEC. 21

Santa Rosa: Celebrate the winter solstice by making winter inspired crafts and hiking to Spring Lake, between 1 to 5 p.m. at Spring Lake Regional Park, 393 Violetti Road. Parking, $7, free to Regional Parks members. Visit SonomaCountyParks.org or call 707-539-2865 for details.

REDWOODS HIKE, DEC. 23

Santa Rosa: Learn about redwood trees during an interactive bilingual walk through the groves at North Sonoma Mountain Regional Park and Open Space Preserve, 5297 Sonoma Mountain Road, 10 to 11:30 a.m. Visit SonomaCountyParks.org. Parking, $7, free to Regional Parks members.

FOOD AND MEDICINE, DEC. 30

Rohnert Park: Explore and identify wild edible food and medicinal plants growing at Crane Creek Regional Park, 5000 Pressley Road, 10 a.m. to 2 p.m. Meet at the bike rack. Call 707-565-2041 for information.

RUN DEADLINE, DEC. 29

Santa Rosa: Today is the deadline for free, online registration for Empire Runners Club members for the Resolution Run on New Years Day at A Place to Play in Santa Rosa. Online registration is $10 for nonmembers. Race day registration is $20 for members and nonmembers. Visit empirerunners.org for details.