Southridge Park in Fontana, California played host to the 3rd NMBS venue of 2007 from May 4-6. Racers competed in Super-D, cross-country, mountain-cross, downhill and short track cross-country events at the suburban venue about 45 minutes from Los Angeles. This event was the first in the National series to feature gravity events. Bike magazine was on hand to watch all of the action. Here’s a gallery of images we collected over the weekend.