The official website of the Elkhorn Slough Foundation and Elkhorn Slough National Estuarine Research Reserve
Elkhorn Slough National Estuarine Research Reserve Trails

The Elkhorn Slough National Estuarine Research Reserve is home to 5 miles of hiking trails that meander through a variety of habitats. The colored lines on the map mark the trails.

Temporary Trail Closure at Reserve

The trails to Hummingbird Island, over the Whistlestop Levee, and to the North Marsh Overlook will be closed due to construction through mid-August.  A short bypass trail is being opened to enable visitors to complete the South Marsh Loop Trail - see the red trail on the map below.

The trails will be closed in order for us to remove the three impaired culverts (pipes that carry water) under the trail at Whistlestop and to replace them with a 15' long box culvert opening which will double as a bridge.  This change will both improve the tidal range and circulation in the Whistlestop Lagoon, as well as stabilize the levee and reduce the trail's maintenance. It will take several weeks to complete the work, but it will be well worth the time and inconvenience, as overall this project will enhance the habitat at Whistlestop Lagoon and improve the public’s access to Hummingbird Island.

Project funding has been provided by the American Recovery and Reinvestment Act and the California State Coastal Conservancy.


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This site is maintained by the Elkhorn Slough Foundation in partnership with the Elkhorn Slough National Estuarine Research Reserve
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