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Mt. Tam Watershed closed to vehicles during Red Flag Warning Oct. 28-29

Map of the Mt. Tam Watershed in front of an image of rolling hills. Text reads: Marin Water Mt. Tamalpais Watershed closed to vehicles while Red Flag Warning in effect

Oct. 27, 2023

The National Weather Service has issued a Red Flag Warning for Oct 28-29 that includes the Mount Tamalpais Watershed in Marin County.

Due to high winds, dry conditions and extreme fire danger, the Mt. Tam Watershed will be closed to vehicle traffic until the Red Flag Warning is no longer in effect. For more information about the timing of the Red Flag Warning and fire weather conditions, go to the County of Marin emergency portal at