Southern Coastal Creeks
Muir Beach. Photo by Michelle Maria,
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Marin’s Southern Coastal watersheds include Webb Creek, Lone Tree Creek, Cold Stream, Redwood Creek, Alder Creek, Rodeo Lagoon, and Tennessee Valley.

Webb Creek originates at the peaks of Mt. Tamalpais and flows towards the Pacific Ocean through Steep Ravine Canyon and Mt. Tamalpais State Park.  The creek drains into the Pacific between Stinson Beach and Rocky Point.  North of the community of Muir Beach, Lone Tree Creek and Cold Stream drain the area west of the ridge line that forms the Dipsea and Coastal Fire Roads.  They flow through the lands of the Golden Gate National Recreation Area (GGNRA) and into the Pacific Ocean.

The Redwood Creek watershed begins at the peak of Mt. Tamalpais and extends southwest to Muir Beach where it drains into the Pacific Ocean.  The watershed encompasses an area of less than 9 square miles.  At the mouth of the watershed is Big Lagoon, an intermittent tidal lagoon.  The watershed provides habitat for several sensitive species, including northern spotted owl, California red-legged frog, Coho salmon, and steelhead trout.  The watershed is located in a recognized global biodiversity “hot spot” (one of only 5 in the continental United States) and is also within Golden Gate Biosphere Reserve.  The main tributaries to Redwood Creek include Bootjack, Fern, Kent Canyon, Rattlesnake, and Spike Buck Creeks.

Alder Creek drains the western half of the Bolinas Mesa, including most of the town of Bolinas itself.  The creek flows into Duxbury Reef and the Pacific Ocean through Agate Beach; it is typically dry from April to November.  To the north, Arroyo Hondo and several smaller tributaries also flow into Duxbury Reef; these are part of Point Reyes National Seashore.  The shoreline throughout the watershed is part of the Duxbury Reef Area of Special Biological Significance (ASBS).

The most southerly coastal streams are the Rodeo Lagoon and Tennessee Valley drainages, located north of Point Bonita and south of the Muir Beach community and Coyote Ridge.  These systems flow through the lands of GGNRA and along the western slopes of the Marin Peninsula.  Approximately five intermittent streams flow through the 2 square miles of the Tennessee Valley drainage.  Two main drainages flow from the north and south into Rodeo Lagoon near Fort Cronkhite; the Lagoon drains an area of approximately 4 square miles.

Learn more about the history and habitat of the Southern Coastal watersheds.

Photo by Michelle Maria

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  • Winter Weather Outlook

    The National Weather Service's Climate Prediction Center anticipates that there will be a strong El Niño this upcoming winter and their latest precipitation outlook for December through March indicates that Marin is likely to receive higher than average amounts of

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