Join us for a walk - part of a series of Explore ALT Nature Walks.  This event will be at the Sherwood Forest Conservation Area in Auburn led by Maine Master Naturalist, Travis Sparks. The focus of this walk will be Ferns. About Explore ALT Nature Walks: Free, guided adventures at Androscoggin Land Trust conservation areas. Led by trained Maine Master Naturalists and other volunteer leaders, these walks are a great chance to learn more about the natural world and…