Arrowhead Marsh, Tidal marsh in Oakland, California.
Arrowhead Marsh is a wetland along San Leandro Bay in Oakland featuring mudflats and salt marshes. The area provides critical habitat for water birds and other regional wildlife.
The marsh developed between 1855 and 1895 through sediment deposits from San Leandro Creek during Lake Chabot dam construction. These deposits gradually shaped the present-day bayshore landscape.
The Martin Luther King Jr. Regional Shoreline integrates this natural space into Oakland's environmental education programs through guided nature walks and wildlife observation.
A 1.6-mile (2.6 km) loop trail with multiple access points crosses the area, with parking available near the Martin Luther King Jr. Regional Shoreline Park entrance. Wear appropriate footwear since the path passes through wet and marshy sections.
The area shelters the Salt Marsh Harvest Mouse, an endangered species found only in San Francisco Bay salt marshes. These small rodents have adapted perfectly to life among tidal channels and reed stands.
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