Nature Nights at Oak Grove Nature Center On Friday, May 21st from 7:00 – 8:00 pm, Dr. Lee Christianson, Professor Emeritus from UOP’s Department of Biological Sciences, will be presenting a talk titled, “Animals of the Oak Grove”. Join us as we learn about the wide variety of wildlife found within California’s oak woodlands. This program is free and open to the public. Oak Grove Regional Park entrance fee of $5 is required per vehicle. Please call (209) 953-8814 for more information.