This small coastal lagoon is formed by a sandbar that dams Stemple Creek, which starts in the hills of Marin County and flows west near the mouth of Tomales Bay, southeast to Bodega Bay, northwest of Dillon Beach. A variety of seabirds and water species rely on its natural environment, including 923 acres of associated wetlands. The California Department of Fish and Wildlife identifies this marine protected area as one of the most significant habitat areas in the state.

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April 27, 2020

Cycling

After climbing all the way to the summits of the ridges on either side of this valley, the road drops back down all the way to sea level to cross the esteros, valleys with rivers affected by the tidal push of water upstream.

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Nearby routes

Best routes near Estero de San Antonio

riders

#1.

Dillon Beach & Estero de San Antonio loop

17.2km

01:13

330m

Cycle the moderate 10.7-mile Dillon Beach & Estero de San Antonio loop in Marin County, featuring coastal views and rolling hills.

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Moderate

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#2.

English Hill vista – Estero de San Antonio loop from Molino

64.4km

04:06

690m

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Hard

4.0

(1)

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#3.