11 am: Photography

A new survey devoted to photographer William Wegman demonstrates the artist to be more than a cottage industry producing photographs and films of his pet Weimaraners. Spanning 30 years, the survey will trace the conceptual artist’s career from his early photographs, mid-career drawings, altered found photographs and his famous portraits of Weimaraners that have been immortalized in storybooks, photographs and television.

* “William Wegman,” Orange County Museum of Art, 850 San Clemente Drive, Newport Beach. Tuesdays-Sundays, 11 a.m.-5 p.m. Ends July 16. Adults, $5; seniors and students, $4; children under 16, free. (949) 759-1122.

all day: Racing

The California Speedway in Fontana kicks off its NASCAR racing season with numerous weekend events. The Auto Club 300 Busch Series Race at noon and the Pontiac Wide Track Grand Prix 200 Winston West Race at 3:30 p.m. will highlight Saturday’s events. A musical performance by the Marshall Tucker Band and a fireworks display will take place starting at 6:30 p.m. Practices, qualifying races and driver introductions will take place in the morning. Sunday’s main event will be the NAPA Auto Parts 500 Winston Cup Series Race at 11 a.m., featuring defending champion Jeff Gordon. Parade laps featuring Harley Davidson motorcycle riders, a canine disc exhibition and a skydiving show will precede the race beginning at 9 a.m.

* Opening day of the NASCAR racing season, California Speedway, 9300 Cherry Ave., Fontana. Saturday, 8:30 a.m.-8 p.m. Sunday, 9 a.m.-3 p.m. Saturday, $35 and $45; Sunday, $50 to $100. (800) 944-RACE.

2 pm: Family

Using juggling, balancing, miming and audience participation, New Vaudevillian performer and science educator Garry Krinsky explores the principles of gravity and leverage and human imagination in “Toying With Science.”

* “Toying With Science,” Beckman Auditorium, Caltech, 332 S. Michigan Ave., Pasadena. 2 p.m. $5 to $10. (888) 222-5832; (626) 395-4652.

8 pm: Comedy

In “Culture Clash Anthology: A 15-Year Retrospective,” the Chicano/Latino comedy trio of Richard Montoya, Ric Salinas and Herbert Siguenza celebrates 15 years of “revolutionary” comedy.

* “Culture Clash Anthology: A 15-Year Retrospective,” Los Angeles Theatre Center, 514 S. Spring St. 8 p.m. Regular schedule: Thursdays-Saturdays, 8 p.m.; Saturdays and Sundays, 3 p.m. Ends May 21. $20 to $27, (213) 485-1681.

8 pm: Theater

Theatre West’s main-stage season continues with Doug Haverty’s drama, “Come Baby, Cradle and All,” with Lee Meriwether, who plays the mother of a young woman who learns that her unborn child has Down syndrome and struggles with a difficult decision. Directed by John Gallogly; original music by Eric Bikales.

* “Come Baby, Cradle and All,” Theatre West, 3333 Cahuenga Blvd. West. Thursdays-Saturdays, 8 p.m.; Sundays, 3 and 7 p.m., except May 14, 3 p.m. only. Ends May 21. $15. (323) 851-7977.

7:30 pm: Music

To celebrate the 70th anniversary of Santa Monica College, a concert features Cloris Leachman narrating “Peter and the Wolf.” This program by the Santa Monica College Symphony and Concert Chorale, conducted by James E. Smith, also displays piano soloist Kirill Gliadkovsky, who plays Beethoven’s Choral Fantasy. The concert also lists music by Prokofiev, David Goodman, Cliff Eidelman and Leonard Bernstein.

* The 70th anniversary concert by Santa Monica College Symphony and Concert Chorale, Civic Auditorium, 1685 Main St., Santa Monica. 7:30 p.m. $10 to $15. (310) 434-3000.

7:30 pm: Music

Colleen Cronin conducts her ensemble, the Concert Singers, with tenor soloist Aaron Nigel Smith in an evening of spirituals, traditional expressions arranged by Moses Hogan, Jester Hairson, John Rutter and others.

* The Concert Singers, at Covenant Presbyterian Church, 6323 W. 80th St., Westchester. 7:30 p.m. $12. (310) 645-8350.

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FREEBIES: For the final, admission-free Community Concert by the Los Angeles Philharmonic, conductor and violinist Augustin Dumay brings the ensemble to the Student Center at Cerritos College, 11110 Alondra Blvd., Norwalk, for a Mozart program. 7:30 p.m. (562) 860-2451, Ext. 2629.

Local artists celebrate the Los Angeles River with “River Visions,” 40 temporary art installations along the riverside walkway, from Rattlesnake Park, at Fletcher Drive near Ripple Street, to Zanja Madre Park, at Riverside Drive near Barclay Street. 9 a.m.-dusk. Also Sunday. (323) 850-8566.