Feb. 20-21: Whale watching, orchids and more

A great hike

Lighthouse vantage: What’s the secret for spying gray whales during migration season? Location, location, location! And location doesn’t get any better than the tallest lighthouse on the West Coast. The historic 115-foot Lighthouse Tower at Point Arena Light Station in Mendocino County sits on a spit of land jutting 2 miles into the ocean. Climb to the top of the lighthouse for a panorama of the Pacific and a prime place for gray whale sightings, especially female grays and their nursing calves. [Visit WeekendSherpa.com for details and other local adventures]


Orchids in bloom: Check out breathtaking blooms at the San Francisco Orchid Society’s Pacific Orchid Exposition, which features three days of lectures, potting demonstrations and more than 150,000 orchids from around the world. [10 a.m.-5 p.m., Fort Mason Center, Marina Boulevard and Buchanan Street, S.F.; www.orchidsanfrancisco.org]

Syrian crisis: Photojournalist and filmmaker Giles Duley, who lost an arm and both legs to a landmine in Afghanistan, discusses “The Invisible People,” his documentary about Syrian refugees. [Noon, Commonwealth Club, 555 Post St., S.F.]

New dance: “Time and the Weather,” a world premiere by choreographer Nancy Karp and composer Kui Dong, plays with light, texture and movement. [7 p.m., ODC Studio B Theater, 351 Shotwell St., S.F.]

Hollywood talk: Issa Rae, star of the Web series “The Misadventures of Awkward Black Girl,” and “Dear White People” director Justin Simien are sharing stories about being black in Hollywood. [7 p.m., Jewish Community Center, 3200 California St., S.F.]

Family film: Revisit the dazzling stop-motion effects of Ray Harryhausen in 1963’s “Jason and the Argonauts,” part of the Balboa Theatre’s “Popcorn Palace” series. [10 a.m., Balboa Theatre, 3630 Balboa St., S.F.]


Pan-Pacific flashback at 100: Celebrate the 100th anniversary of the Panama-Pacific International Exposition at a Community Day Festival featuring music, period-appropriate celebrity impersonators and a “uke-a-thon” celebrating the mighty, tiny ukulele. [Noon-10 p.m., Palace of Fine Arts Theatre, 3301 Lyon St., S.F.; http://www.ppie100.org]

Salad days: Pascale Beale turns greens, grains and more into healthy salads in her new cookbook “Salade: Recipes from the Market Table.” [3 p.m., Omnivore Books on Food, 3885a Cesar Chavez St., S.F.]

Smooth R&B: Take a trip back to the early 1990s with K-Ci and Jojo of R&B powerhouse Jodeci, whose hits included “Stay” and “Come and Talk to Me.” [7 and 10 p.m., BAL Theatre, 14808 E. 14th St., San Leandro]

Bollywood benefit: DJ SSHaaN spins Bollywood tunes and more at “Love, Pyar and Ishq,” a fundraiser for Trikone, a nonprofit serving the South Asian LGBT community. [8 p.m., OMG, 43 Sixth St., S.F.]

A great bike ride

Outer Sunset survey: Bike around western San Francisco on a guided ride with Andy Thornley and enjoy an afternoon near the beach while picking up fun facts about biking in the Outer Sunset. The ride is free for San Francisco Bicycle Coalition members; $10 suggested donation for nonmembers. Rain cancels ride. [1:30-3:30 p.m., meet at Devil’s Teeth Baking Co., 3876 Noriega St., S.F.; sfbike.org/events]

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