She won the U.S. National Championships women’s singles title in 1899.
On June 21, 1899, Marion Jones Farquhar triumphed at the U.S. National Championships, winning the women's singles title by defeating Maud Banks in the final. This victory was a testament to her skill and determination, securing her place among the elite female athletes of her era. Her championship win was significant in the evolution of the sport, inspiring many women to pursue tennis at a competitive level.