Boat Dock on Middle Slough

Managed by Cosumnes River Preserve

Since Oct 2025

In California, US

CRP108

This chronolog combines 25 photos from 22 contributors. Learn more

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Boat Dock on Middle Slough

Middle Slough is tidally influenced by San Francisco Bay—nearly 80 miles away—causing daily water level fluctuations of 3–5 feet. The dock is a favorite resting and hunting spot for green herons and black-crowned night herons.

Seasonal & Climate Resilience to Observe

Tidal Range & Water Levels – Daily fluctuations and changes during storms, drought, or sea-level rise.

Salinity Shifts – Freshwater–tidal balance during wet and dry years.

Bank & Dock Stability – Erosion or sediment buildup from changing flows.

Vegetation Response – Health of emergent and shoreline plants under variable water levels.

Wildlife Use – Seasonal presence and foraging behavior of herons and other waterbirds.

Monitoring these indicators helps track how this tidal freshwater system adapts to extreme rainfall, prolonged drought, and long-term sea-level change.

About Cosumnes River Preserve

The Cosumnes River Preserve consists of over 50,000 acres of wildlife habitat and agricultural lands owned by seven land-owning Partners. The Partners include The Nature Conservancy, Bureau of Land Management, California Department of Fish & Wildlife, Sacramento County Regional Parks, Department of Water Resources, Ducks Unlimited, and the California State Lands Commission. The Preserve is centered along the Cosumnes River, its floodplains and riparian habitat. This habitat is buffered by a variety of agricultural operations. The Preserve provides numerous social, economic, and recreational benefits to local communities and to people residing in the larger Sacramento and San Joaquin areas. The habitat supports wildlife, including birds that migrate throughout the Pacific Flyway.

Location

Coordinates: 38.263574, -121.439881

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Chronolog is a monitoring tool for parks, nature centers, wildlife organizations, schools, and museums worldwide. With over 100,000 contributors across 300 organizations, Chronolog is on a mission to engage communities with nature while recording important natural changes.