The following was reported in the Salt Lake Tribune, 29th June 1926, pg 14:
Warsaw, Poland, June 28 (AP): The first motor car race by women held in Poland was run yesterday over a course of 305 km. Of 17 starters, 16 finished. Mrs Toeffler won.
Quite why this is reported in a paper in Utah, USA, I don't know, but this is the first I've heard of this event. Does anyone know anything else about this?