Grover Beach Library book sale
8 a.m. to 3 p.m.
Wide selection of fiction, non-fiction, research, table top and collectible books. Grover Beach Library, 240 N. Ninth St., Grover Beach. 805-473-4131.
SWAP Elfin Forest Work Party
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9 a.m. to noon
Help with weeding, erosion control and other tasks in the Elfin Forest. Wear sturdy shoes, long pants and sleeves. Bring work gloves and shovel. El Moro Elfin Forest Natural Area, North end of 15th Street off Santa Ysabel, Los Osos. Free. 805-528-0392.
10 a.m. to 4 p.m.
Unique gifts from local crafters. Giovanni’s Fish Market, 1001 Front St., Morro Bay. Free.
Maritime Museum of Morro Bay
10 a.m. to 3 p.m.
Open house and onboard tours of the U.S. Navy DSRV Avalon and the U.S. Coast Guard Roll-over Rescue Boat. Morro Bay Maritime Museum, 1210 Embarcadero. $5 adults; children 12 and under, free with adult.
Fiscalini Ranch Preserve Ocean Bluff Walk
10 a.m. to noon
Docent-led walk. Friends of the Fiscalini Ranch Preserve, 604 Main St., Cambria. 805-927-6223.
Geology Rocks: Guided Hike Range
10 and 11 a.m.
A ranger will guide the hike. Wear study shoes and bring water. Meet at the registration office. Rain cancels event. Lopez Lake, 6800 Lopez Drive, Arroyo Grande. Park day-use fee $10 per vehicle. 805-788-2381.
Project Fix of the Central Coast
10 a.m. to 1 p.m.
Bring anything — electronics, jewelry, clothing, etc. — for volunteer fixers and tinkers to repair. iFixIt, 1330 Monterey St., San Luis Obispo. Free. 330-519-2972.
Discovery Saturday: Beach Exploration
11 a.m. to 1 p.m.
Learn about the mysteries of San Simeon Cove by beachcombing with marine biologists. Coastal Discovery Center, Highway 1, San Simeon. $2. 805-927-6575.
White’s Point Vistas
11 to 11:45 a.m.
Short, steep walk to view the estuary, home to hundreds of marine and terrestrial animals. Morro Bay State Park Museum of Natural History, 20 State Park Road. Free. 805-772-2694.
Sea Otter Experience
11 a.m. to 3 p.m.
Educational family event; use spotting scopes and binoculars. Morro Rock, 101 Coleman Drive, Morro Bay. Free. 805-772-2694.
Trolley Tours to the Point San Luis Lighthouse
Noon, 1 and 2 p.m.
1, 4 and 7:30 p.m.
Retro-futuristic production “Steam Cirque.” Madonna Inn Meadows, 100 Madonna Road, San Luis Obispo. $12 to $72, free for under 2. 877-468-3861.
Celebration of Local Authors
1 to 5 p.m.
Authors of fiction, nonfiction and children’s books will sell and autograph their works. Keynote speaker is author Stephen Provost, editor of The Cambrian. Veterans Memorial Building, 1000 Main St., Cambria. $5; under 16, free. 805-927-1442.
The Big Daddy Blues
2 to 6 p.m.
Barefoot Concerts on the Green. Music, dancing, food and bounce slides. Sea Pines Golf Resort, 1945 Solano St., Los Osos. Free. 805-528-5252.
Live @ Linn’s Summer Concert Series
2 to 5 p.m.
Live local music, beer, wine, and food in the gardens. Linn’s Easy As Pie Café, 2451 Bridge St., Cambria. Free. 805-924-3040.
Fireworks, wine tasting and music by the San Luis Obispo Symphony, Swing Dolls and winners of the Paderewski Festival Youth Piano Competition. Paso Robles Horse Park, 3801 Hughes Parkway. $15 to $75; 805-235-5409.
Quota International of Atascadero Art Scene
5 to 7:30 p.m.
Art demonstrations, music, wine, beer, refreshments and silent auction of original art. Pavilion on the Lake, 9315 Pismo Avenue, Atascadero. $30. 805-460-9182.
5 to 8 p.m.
Gypsy jazz, Latin, mainstream jazz and R&B. Red Barn, 2180 Palisades Ave., Los Osos. $15. 805-215-3238.
Improv comedy show
8 to 10 p.m.
Kreuzberg Coffee Co., 685 Higuera St., San Luis Obispo. $5. 805-438-2060.
Smokey Bear Show
8:30 to 9:30 p.m.
Meet at Nature Center near the Marina for campfire show. Lopez Lake, 6800 Lopez Drive, Arroyo Grande. Park day-use fee $10 per vehicle. 805-788-2381.
For a complete list of events, visit events.sanluisobispo.com.