Experience the salt marsh at twilight on an easy stroll along Tidelands (1 1/3 mile) Trail. At the setting of the sun we will observe the beginning of nature night shift. Come discover the sights, sounds, and smells of the refuge as night descends. Not suitable for young children. RESERVATIONS REQUIRED. Register at http://donedwardstwilight.eventbrite.com or call 510-792-0222 ext. 363. Led by Mary and Gene Bobik.