Meet leader Ken Burton at 2 p.m. in front of the Interpretive Center (which remains closed to the public) on South G Street for a 90-minute walk focusing on the birds, plants, and/or ecology of the Marsh. Tours are limited to the first 15 people. Bring a mask and be prepared to social distance outside of your family group. This tour will be cancelled if Humboldt County returns to the Red COVID tier. For more information, call (707) 826-2359.