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Originating in Dogtown, the Olema Valley Trail parallels a sag pond marsh along the San Andreas fault (see the previous “Rift Zone Trail” posting) that drains into Pine Gulch Creek and flows into Bolinas Lagoon. The dense stand of cattails (Typha) indicates standing fresh water with soil saturated year-round. Notice the cotton-like seeds fluffing from the flower spikes–perfect lining for the nests of hummingbirds, yellowthroats, and marsh wrens, species that are already building nests in this habitat.

Photograph by Jules Evens.

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