Olga Kevelos won two gold medals at a motorcycle event popular in what countries?
Olga Kevelos: Olga Kevelos (6 November 1923 – 28 October 2009) was an English Motorcycle trials and enduro rider who was the only woman to win two gold medals at the International Six-Day Trial. Motorcycle trials:  The sport is most popular in the United Kingdom and Spain, though there are participants around the globe.
United Kingdom and Spain