The Arcata Marsh & Wildlife Sanctuary Access at South G Street provides entry to a 307-acre sanctuary featuring approximately 5 miles of walking and biking paths, including the ADA-accessible Humboldt Bay Trail.

The site offers an Interpretive Center with maps and resources, parking areas, and access to multiple trail options including the Butcher's Slough Trail with numbered interpretive signposts; fishing is permitted on the south side of Klopp Lake and in Humboldt Bay, while non-motorized boats are allowed in Butcher's Slough and Humboldt Bay only.