Placer County Fall Festivals It is late August, school is starting, the weather is changeable and it is time to start planning for the fall festivals! While there is always something to do in Placer County during the year, it is Fall Festival season. If you are looking for something to do on the weekends in September, here are some fun family activities. FORESTHILL HERITAGE FESTIVAL Sep 04, 2010 to Sep 05, 2010 Saturday & Sunday 10 a.m. to 4 p.m. Foresthill Foresthill, CA 530 367-2474 GOLD COUNTRY FAIR Sep 09, 2010 to Sep (0 comments)