Friends of the Arcata Marsh (FOAM) is sponsoring a free tour of the Arcata Marsh & Wildlife Sanctuary on Saturday, October 12. Meet leader Sharon Levy at 2 p.m. in the lobby of the Interpretive Center (AMIC) on South G Street for a 90-minute, rain-or-shine walk focusing on Marsh history, ecology, and how wetlands clean polluted water. For more information, call (707) 826-2359.