The very first March of Dimes walkathon occurred in San Antonio, Texas, on October 7, 1970, followed by similar walks in Ohio at Columbus on November 14 and Mentor (Lake County) on November 15. The weather conditions at the Columbus walkathon were depicted as "absolutely miserable rain, cold and bone chilling winds, which did not abate at all during the walking period." Yet the 500 walkers at Columbus pledged $64,687 to the March of Dimes, engendering a fund-raising methodology that quickly became national in scope and that perpetuated the enthusiasm of volunteers on which the foundation built its reputation. By 1974, 95% of March of Dimes chapters participated in the event, accounting for more than $14 million in revenue. Successful walkers received the Order of the Battered Boot certificate for their participation, and the foundation created a film, "The Big Walk" (1973), to document and promote the event.