2025
2026



2025
2026
Managed by Cosumnes River Preserve
Since Oct 2025
In California, US
CRP104
This chronolog combines 142 photos from 131 contributors. Learn more
From this vantage point, you can almost see the confluence of Middle Slough and the Cosumnes River—a rare example of a largely undammed river system in California. Rivers and sloughs once flowed more naturally like this before widespread dam construction altered seasonal flood cycles.
Seasonal & Climate Resilience to Observe
Floodplain Inundation – Timing, duration, and extent of seasonal flooding.
Channel Movement – Natural bank erosion, sediment deposition, and channel shifts.
Vegetation Response – Recruitment of native riparian species after high-water events.
Wildlife Use – Fish and bird presence during flood and dry seasons.
Low-Flow Conditions – Water depth and connectivity during drought periods.
Tracking these patterns helps assess how a free-flowing system adapts to extreme rainfall, prolonged drought, and long-term climate variability.
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.
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.
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