Join naturalists Vicki Powers and Ralph Terry for a walk in search of desert birds at 8 a.m., Friday, Nov. 19. Take a hike through the desert at night at 7 p.m., Friday, Nov. 19. A morning hike takes place at 9 a.m., Wednesday, Nov. 24. All events are free with payment of a park-use fee of $10 per car; or $5 for pedestrians or bicyclists. Call for more information.