Early April till late June the park is closed to moterized vehicles on Wednesday's evening's. This is the only time we came ride there on the single track and double track mostly. RaceMTB.com holds races which are fun and easy going and are the reason we can us the property Wednesday night's. As long as you stay out of the way and are out by 8:00 p.m. it's all good.
The year-round SVRA is located at the base of the Sierra Nevada foothills, 20 miles east of downtown Sacramento and three miles south of U.S. 50.
http://www.singletracks.com/item.php?c=1&i=1576