Stock photography, photos: Windmills on hills near Livermore Stock photos of 25060PH - Windmills cover the green hills of spring near Livermore, California. Image taken with large format 4x5 and Fuji Velvia film. Photograph: © Lon Overacker Click for a larger image and more information Keywords associated with this stock photo: windmill, spring, green, hills, wind power, clouds, cattle, cows, livermore, patterson pass, california, usa, united states