SATURDAY

11:30 a.m.

Family

For the second year in a row, the Angela Louise and Newport Belle stern-wheelers will have a riverboat race through Newport Harbor to raise money for the Newport Harbor Nautical Museum’s Young Mariners Program. The paddleboats--scale replicas of the 19th century riverboats made famous in the writings of Mark Twain--will churn along a half-mile course from the museum (inside the Pride of Newport) through the main channel and back, at heady speeds of almost 5 miles per hour. The boats will race in three heats: at 11:30 a.m., 12:30 and 1:30 p.m. The public is invited to ride along for the price of $10 per heat, or $25 for all three. Proceeds will help to send underprivileged students on a tour of the Endeavour, a touring replica of an 18th-century tallship that provides lessons on sailing history and marine science. Spectators can view the races for free from the decks of the Pride of Newport.

* Newport Harbor Nautical Museum at the Pride of Newport, 151 E. Coast Highway, Newport Beach. (949) 673-7863.

1:30 & 3 p.m.

Family

The Da Camera Society’s “Children’s Concerts in Historic Sites” series presents mezzo-soprano Suzanne Guzman, actor-storyteller Richard Yn~iguez and classical music radio station KKGO’s Rich Capparela in a program of songs and stories celebrating the exhibition “Vento Sul.”

* Museum of Latin American Art, 628 N. Alamitos Ave., Long Beach. $12 to $18, (310) 954-4300.

SATURDAY

8 p.m.

Music

Founded in 1985 as the Foothill Cities Chapter of the Society for the Preservation and Encouragement of Barbershop Quartet Singing in America Inc., Masters of Harmony has won the international championship title three times, in 1990, 1993 and 1996. (A winning chorus must wait three years before competing again.) The Santa Fe Springs-based group numbers about 140 voices.

* Robert B. Moore Theatre, Orange Coast College, 2701 Fairview Road, Costa Mesa. $16-$21. (714) 432-5880.

SATURDAY

9 p.m.

Pop Music

After a four-year layoff, Cadillac Tramps, one of Orange County’s hardest-hitting and most popular grass-roots bands of the ‘90, is staging a comeback bid with its fat, swampy beats and blues-punk guitar attack. This show marks the start of the Tramps’ campaign to win their due after three albums that achieved overlooked-treasure status.

With the Devil Doll and the Dead Boys Club. Roxy, 9009 Sunset Blvd., West Hollywood. $12.50. (310) 276-2222.

SATURDAY

7:30 & 9:45 p.m.

Jazz

Dee Dee Bridgewater is a singer out of the great tradition of Ella Fitzgerald and Carmen McRae, a performer who has appeared with such highly regarded ensembles as the Thad Jones-Mel Lewis Orchestra and also taken the part of Billie Holiday in the musical “Lady Day.” A master of swing phrasing and possessed of a glowing, almost golden voice, Dee Dee’s sure to set your toes a tappin’.

Founders Hall, Orange County Performing Arts Center, 600 Town Center Drive, Costa Mesa. Also Sunday, 5:30 and 7:45. 7:30 and 5:30 perfromances $36, 9:45 and 7:45 performances $32. (714) 556-2787.