Stone Lakes

About

Stone Lakes National Wildlife Refuge, California — 1992 Record of Decision, 1994 Refuge Established, 2010s 25-mi Sacramento. Water sits at the center of the Stone Lakes story. The reach here runs about 26 miles and carries a Class I rating, with flows that average roughly 1,231 CFS at USGS gauge 11469000. Paddlers find the most workable conditions in the 625–1,850 CFS band — enough water to move through the freshwater lakes and flooded fields without the delta's flat sloughs turning to mud. It is quiet water by design, a chain of lakes rather than a whitewater run, and the flow numbers reflect that gentle, valley-floor character.

Before the refuge, this was floodplain country. The Central Valley wore a mosaic of seasonal and permanent wetland, open water grading into grassland and riparian forest, long before levees and farms reshaped the landscape into the agricultural checkerboard that surrounds Sacramento today. Stone Lakes preserves a working remnant of that older geography. Set within the northern reaches of the Sacramento–San Joaquin River Delta, the refuge occupies the transition zone where the valley's freshwater lakes meet the tidal edge of the delta — a boundary that concentrates wildlife in a way few other stretches of the valley can match.

The modern refuge came together through a deliberate federal process. A Record of Decision for the establishment of the Stone Lakes National Wildlife Refuge, Sacramento County, California, was published in 1992, setting the terms for what would follow. Two years later, in 1994, the refuge was formally established to protect and enhance local and migratory wildlife and the Central Valley habitats around it. That founding date remains its defining historical chapter; the U.S. Fish & Wildlife Service has been conserving and enhancing this Central Valley habitat and its wildlife continuously since.

Across its 6,421 acres, the refuge manages a layered system: managed grasslands, wetlands, freshwater lakes, and riparian forest, each doing a different job. The freshwater lakes and flooded fields pull in waterfowl and shorebirds, especially during migration, while the riparian corridors along the water hold resident species through the year. It is this stacking of habitat types — the reason the site earned refuge status in the first place — that lets Stone Lakes function as more than open water. The whole basin operates as one connected floodplain unit.

Stone Lakes also sits inside a much larger hydrological frame. The refuge is part of the Sacramento River watershed, and that watershed is a key part of the broader Sacramento–San Joaquin Delta system — the plumbing that drains much of northern and central California. The refuge protects the Stone Lakes basin and a section of the Sacramento River floodplain, tying a small, managed wetland to one of the West's most important river networks. Today it supports the surrounding Sacramento, Elk Grove, and Florin economies, drawing visitors to a piece of historic Sacramento Valley wetland that has held its place at the edge of a rapidly growing metropolitan region.