Margaret Heffernan Borland (April 3, 1824 – July 5, 1873) was a pioneering frontier woman who ran her own ranch, as well as handled her own herds.
She made a name for herself as a cattle baron and was infamous for her Texas Longhorn cattle that she took up the Chisholm Trail from Texas to Wichita, Kansas, with her three surviving children and her granddaughter.
To date, she is the only known woman in the history of the United States to run her own cattle drive and was considered one of the first Cattle Queens after being widowed thrice.