Santa Teresa County Park? Henry Coe?
I ride a rigid fork as well. As Roja suggested the open spaces off of Skyline Rd (35) are great; I have ridden Saratoga Gap, Long Ridge and Russian Ridge - great trails. Saratoga Gap has the most technical of the three. I have heard great things about Santa Teresa as well, Coe has lots of trails but may be more on the challenging side.