FIX A FLAT CLINIC, SEPT. 13

Healdsburg: Learn how to fix a bicycle flat tire, 6:30-8:30 p.m. at Spoke Folk Cyclery, 201 Center St., Healdsburg. 707-433-7171, info@spokefolk.com. Hosted by the Sonoma County Bicycle Coalition’s Biker Chicks.

COASTAL CLEANUP, SEPT. 15

Sonoma County: Volunteer to clean up Sonoma County Regional Parks and Sonoma Coast beaches between 9 a.m. and noon as part of California Coastal Cleanup Day, then enjoy a picnic 1-3 p.m. Sponsored by Coastwalk and Sonoma County Regional Parks. Visit coastwalk.org or speak with John Ryan, 707-565-3356, for details.

TWILIGHT HIKE, SEPT. 15

Occidental: Potluck dinner and 2- to 3-mile hike 4:30-9:30 p.m. with an option to camp overnight at the Bohemia Ecological Preserve in the hills above Occidental, 6773 Bohemian Highway, just past Westminster Woods. The event is adult focused. Visit LandPaths.org for details.

FAMILY HIKES, SEPT. 15

Santa Rosa: Short, 1-mile round-trip family-friendly hikes at 1 and 3 p.m, Spring Lake Regional Park, 393 Violetti Road. Participate in a science project along the way. Parking $7. SonomaCountyParks.org. 707-539-2865.

MILL DEMONSTRATION, SEPT. 15-16

Sebastopol: Step back in history and see a free demonstration of a steam-powered saw mill, 10 a.m. to 3 p.m. at Sturgeon’s Mill, 2150 Green Hill Road. Dogs not allowed, hot lunches for sale. Visit sturgeonsmill.com, 707-829-2479.

ECO-PRINT WORKSHOP, Sept. 16

Santa Rosa: Bring a picnic lunch and create a unique eco-print silk scarf or bandana 9 a.m.-2 p.m. at the Laguna de Santa Rosa Environmental Center, 900 Sanford Road. The event includes a 1-2- mile walk along Irwin Creek. $15 for materials, registration required at lagunafoundation.org.

WATER BARK, SEPT. 16

Santa Rosa: Dogs run and frolic off-leash at the Spring Lake swimming lagoon, 393 Violetti Road, 9 a.m.-5 p.m. $5 for Regional Parks members, $7 non-members plus $7 parking. SonomaCountyParks.org.