1997's world record holder was Chris Andersen from Moraga, California. My thanks to Chris for the photos and for letting me make use of his growth data. Check out the Anderson Gallery for more photos.
This is a graph of of estimated weight versus time for Chris's 977 pound pumpkin. The growth rate is truly impressive. During August Chris' pumpkin averaged over 22 pounds per day! Even his #2 pumpkin at 815 pounds would be a record breaker in many areas.