Kittie Knox was a cyclist during the bicycle boom of the late 19th century. She was biracial and became known not just for participating in a predominantly white sport, but also for the clothes she wore to do it.
Research:

Richard Peters and Early Atlanta History
38:07

SYMHC Classics: Nelson Pill Hearings
38:25

Behind the Scenes Minis: Alaska and Contraceptives
28:17