Marin County Open Space District Adventures

The Marin County Open Space District (MCOSD) encompasses more than 20,000 acres of protected land across Marin County, California. This public agency manages an array of parks, preserves, and open spaces aimed at conserving natural habitats, safeguarding watersheds, and offering recreational access. The geography of the district features coastal terraces, steep hillsides, oak woodlands, redwood forests, and wetlands, with elevations ranging from sea level to over 2,500 feet. These varied habitats support wildlife species such as black-tailed deer, bobcats, mountain lions, numerous bird species including red-shouldered hawks and owls, and rare plants like the Marin Dwarf Flax. Historically, the lands were inhabited by Coast Miwok peoples before becoming ranchlands and later protected open space. Recreation opportunities include hiking, mountain biking, horseback riding, bird watching, and photography. Notable landmarks include Mount Tamalpais State Park adjacent to many district properties, Alamere Falls, and the preserved historic structures at Indian Tree Ranch. Visitors enjoy well-maintained trail systems connecting ridgelines and valleys with panoramic views of the San Francisco Bay, Point Reyes National Seashore, and the Pacific Ocean. The district actively engages community members through volunteer programs, educational outreach, and habitat restoration projects. Marin County Open Space District is valued for its combination of natural beauty, biodiversity, and accessibility, serving as a vital greenbelt near the urban San Francisco Bay Area.