In 1928, at age 13 she won the "Silver Gate Channel Swim" with a time of 8m 30s.

[2] She retained the title the following year, covering the 650-yard paddle in the fastest time ever made in either the men's or women's races.

[3] She represented the United States at the 1932 Summer Olympics in Los Angeles.

Forbes finished sixth overall in the 400-meter freestyle, recording a time of 6:06.0 in the event final.

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