About
In the high desert near Picabo, Idaho, a cold, wildlife-filled stream winds through wetlands and grasslands, fed not primarily by mountain runoff but by water emerging from the ground.
Water from the surrounding hills and nearby Big Wood River percolates underground through an aquifer before being forced back toward the surface near the Picabo Hills. Numerous springs feed seven large tributaries of Silver Creek. The emerging water is alkaline, nutrient-rich, and stays at a relatively constant temperature throughout the year. Those conditions support abundant aquatic insects and a wild trout fishery, while the surrounding riparian habitat attracts moose, coyotes, bobcats, eagles, and more than 150 recorded bird species.
The landscape visitors see today is also the result of a long restoration experiment. Before the preserve was established, livestock grazing, fishing pressure, erosion, and other disturbances had degraded portions of the creek and its watershed. The Nature Conservancy purchased the original 479-acre property in 1976 after encouragement from the local community. The preserve has since expanded to 882 acres, while more than 15,000 additional acres in the watershed have received protection, many through conservation easements.
Know Before You Go
The preserve is normally open dawn to dusk year-round. Visitors must sign in before entering, and dogs are not permitted. Hiking, birding, photography, fishing, canoeing, and seasonal snowshoeing are among the permitted activities. Fishing is normally open from Memorial Day weekend through November 30 and is subject to preserve and Idaho fishing regulations.
As of August 2026, visitors should check current conditions before traveling. The Nature Conservancy has announced access restrictions associated with replacement of Kilpatrick Bridge beginning August 24, including closures affecting Kilpatrick Pond and recreational floating.
Sponsored by Visit Sun Valley. Click here to plan your visit.
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Published
September 1, 2026