Florence Lowe "Pancho" Barnes (July 22, 1901 – March 30, 1975) was a pioneer aviator, the founder of the first movie stunt pilots' union. In 1930, she broke Amelia Earhart's air speed record. Barnes raced in the Women's Air Derby and was a member of the Ninety-Nines. In later years, she was known as the owner of the Happy Bottom Riding Club, a bar and restaurant in the Mojave Desert, Southern California, catering to the test pilots and aviators who worked nearby.

She was born as Florence Leontine Lowe on July 22, 1901, to Thaddeus Lowe II (1870–1955) and his first wife, Florence May Dobbins, in Pasadena, California. She was born to a wealthy family, growing up in a huge mansion in San Marino, California. During her formative years, she attended the area's finest private schools. Her father, an avid sportsman, encouraged her to appreciate the great outdoors and Florence became an accomplished equestrian.

In 1919, Florence married Reverend C. Rankin Barnes of South Pasadena, California, and they had a son, William E. Barnes.

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