Friends of the Arcata Marsh (FOAM) is sponsoring a free tour of the Arcata Marsh & Wildlife Sanctuary on Saturday, March 23. Meet leader Lynn Jones at 2 p.m. in the lobby of the Interpretive Center on South G Street for a 90-minute, rain-or-shine walk focusing on the human and natural history of the North Bay. For more information, call (707) 826-2359.