Summit Rock has been shut down for seasonal raptor nesting; however, County Parks wants to make this a blanket, indefinite closure, continuing long after the chics have fledged (i.e. between Feb. 1st and July 31st).
For more info, visit the Santa Clara County Parks website and look for the Sanborn County Parks Master plan.
Double Cracks starts just right of University of Santa Clara Practice Climb #1. It actually isn't two cracks down low - but one wide crack and two seams. Stay on the seams below the first bolt. After the bolt, work you way into the wide crack and pull over onto the ledge. Then up top follow the quality double crack system for another 15 feet to the bolts.
Protection
Takes gear up to 3.5" but don't need anything bigger than two inches. There's also one bolt about 15 feet off the ground.
Up top there are two bolts, but nothing to rap from, so walk off to the left when cleaning. This is also how you'd set up a top rope.