According to my Rough Guide of Spain there is a Rioja Wine Harvest Festival from Sept 15-30 that features "barefoot locals stomping grapes, dances, parades, music & bullfights".

In my Let's Go book it mentions a "Fiesta de la Vendimia", offerings of crused grapes from Sept 20-26 in Logrono.

Are these the same? Does anyone know about this/these festivals or any other activities that will be occuring in September during the grape harvest?

I think it would be an incredible experience to be able to visit during this time and I could work this into my Northern Spain trip this September!