Salt Plains National Wildlife Refuge

Salt Plains National Wildlife Refuge in northwest Oklahoma is one of the most unusual and remarkable refuges in North America — a vast expanse of shimmering white salt flats on the Arkansas River, a remnant of an ancient shallow sea, where rare whooping cranes and thousands of shorebirds, waterfowl and sandhill cranes stop on migration, and visitors are uniquely permitted to dig for the spectacular hourglass selenite crystals embedded just inches below the white salt surface.

The 32,000-acre refuge protects the salt plains and their diverse habitats — the salt flats, the Arkansas River, wetlands, sandbars, upland prairie and woodland — a complex that is one of the most important migration stopover sites on the Central Flyway. The crystal-digging area is open seasonally to the public, making this one of the few places in the world where visitors can legally collect natural selenite crystals as souvenirs. Salt Plains NWR is a treasured and truly unique natural icon of Oklahoma.

Salt Plains NWR is enjoyed for crystal digging (the famous hourglass selenite crystal area, open seasonally, where visitors may dig by hand for flat selenite crystals with distinctive hourglass-shaped sand inclusions — a unique experience), wildlife watching and birding (some of the best shorebird, sandhill crane and waterfowl viewing in the region, with whooping cranes possible in spring and fall migration), a wildlife auto tour, hiking on trails, boating and fishing on Great Salt Plains Lake, and swimming at the lake. Crystal digging and birding the migration concentrations are the signature draws.

Spring migration (March through May) and fall migration (August through November) are the premier times for birding, with the greatest concentrations of shorebirds, sandhill cranes, waterfowl and the chance of seeing whooping cranes. The crystal-digging area is open April 1 through October 15 (and requires a free permit). Summer is hot but the lake and fishing are enjoyable. The migration seasons for birds and the crystal-digging season for the selenite crystals are the highlights — come in spring or fall migration for the birds, and any day April–October for the unique crystal-digging experience.

The salt plains of northwest Oklahoma were known to the Kiowa, Comanche, Wichita and other peoples, who came to the salt flats for the salt. Early Spanish and American explorers noted the dazzling white salt plains on the Arkansas River. The refuge was established in 1930 to protect the salt plains and their migrating birds. Denison Dam’s reservoir (upstream) altered the hydrology of the Arkansas. The crystal-digging privilege has been a beloved public tradition for decades. Salt Plains NWR preserves this extraordinary salt-plain ecosystem and crystal heritage, a treasured icon of Oklahoma.

The Salt Plains of northwest Oklahoma are the surface expression of vast underground salt and gypsum deposits (Permian-age evaporites) dissolved by groundwater and emerging as brine at the surface, then evaporating to leave the shimmering white salt crust that covers the flat river bottomland — a landscape left by the drying of the ancient Permian sea. The hourglass selenite crystals (a form of gypsum, calcium sulfate) grow in the wet sand just below the salt crust as the brine evaporates, trapping a distinctive hourglass-shaped sand inclusion as they form. The Permian salt and gypsum beds, the dissolving groundwater and the surface evaporation created this remarkable salt flat.

Salt Plains NWR is one of the most important migration stopover sites on the Central Flyway, with tens of thousands of shorebirds (including rare and uncommon species), sandhill cranes (and occasionally endangered whooping cranes), white pelicans, avocets, stilts, dowitchers and waterfowl using the salt flats, wetlands and the Arkansas River during spring and fall migration. The refuge also hosts nesting snowy plovers on the salt flats, bald eagles in winter, and diverse upland wildlife. Salt Plains is outstanding for birding, with the shorebird and crane concentrations among the best in the southern plains.

Salt Plains NWR protects a remarkable mosaic of salt-flat, Arkansas River, wetland, sandbar, upland prairie and woodland habitats in northwest Oklahoma, forming one of the most important migration stopover complexes on the Central Flyway for shorebirds, cranes and waterfowl. The salt flats support nesting snowy plovers (a sensitive species) and the unique selenite crystal-growing environment. Water management, the Arkansas River’s hydrology and the salt-flat habitat are carefully managed. Protecting the salt flats, the wetlands, the river and the wildlife sustains both the ecology and the extraordinary character of Salt Plains NWR.

Salt Plains National Wildlife Refuge holds a treasured place among the icons of Oklahoma — a shimmering white salt plain on the Arkansas River, where ancient Permian seas left their mark in the dazzling salt crust and the hourglass selenite crystals, one of the great migration stopovers of the central flyway, and one of the only places in the world where the public may legally dig for natural selenite crystals as souvenirs. Its extraordinary geology, spectacular birding and unique public access make it one of Oklahoma’s most remarkable natural experiences. Salt Plains NWR is a cherished icon of Oklahoma.

Salt Plains National Wildlife Refuge is in northwest Oklahoma near the town of Jet in Alfalfa County, off State Highways 11 and 8, about 50 miles north of Enid. The refuge is managed by the U.S. Fish & Wildlife Service; most areas are free and open to the public. The crystal-digging area is open April 1 through October 15 and requires a free permit (issued at the refuge headquarters; limited to a set amount per person per day). The Great Salt Plains State Park, on the adjacent reservoir, offers camping and lake recreation. Check the U.S. Fish & Wildlife Service and Oklahoma State Parks for crystal-digging permit procedures, auto-tour status and conditions before visiting.

The U.S. Fish & Wildlife Service manages Salt Plains NWR and its habitats. Visitors help by following crystal-digging rules (dig only in the designated area, by hand only, within the daily personal limit, and replace all sand to restore the habitat for the snowy plovers), staying on the auto tour route and trails, keeping well away from snowy plover nesting areas, respecting migrating birds, packing out everything, and following all refuge rules. The salt-flat nesting habitat, the migratory bird stopover and the selenite crystal growing environment are sensitive and protected. Protect the salt flats and wildlife to sustain this unique refuge.

The salt plains are vast, flat and reflect intense sunlight — bring sun protection, plenty of water (there is no shade on the flats and Oklahoma summers are brutally hot), and protective footwear (the salt crust can be rough and sharp). The digging area can be muddy and slippery when wet; wear old clothes you don’t mind soiling. Stay well away from snowy plover nesting areas (marked). Watch for rattlesnakes in upland areas. In the heat, visit the salt flats early in the morning. Respect the intense sun and heat, the lack of shade, the nesting plovers and the rattlesnakes.

Crystal digging is permitted only in the designated area (marked at the refuge), only by hand (no tools), and only with a free permit (issued at the refuge headquarters, limited quantity per visit). The crystal-digging area is open April 1–October 15 only. Do not disturb snowy plover nesting areas (marked; seasonal closures apply). Stay on the auto tour route, roads and trails; do not drive on the salt flats. Pets must be leashed. Pack out all trash. Hunting is prohibited in most of the refuge. Check the U.S. Fish & Wildlife Service for current crystal-digging procedures, nesting closures and refuge rules before visiting.

The town of Jet, Great Salt Plains State Park and Great Salt Plains Lake (for camping, boating and swimming adjacent to the refuge), the town of Alva (with a regional university and museums), the Alabaster Caverns State Park to the northwest, and the red-bed and gypsum-hill terrain of northwest Oklahoma lie near the refuge. The northwest Oklahoma plains and gypsum hills define the region. Salt Plains NWR anchors the outdoor and geological experience of northwest Oklahoma, easily combined with Great Salt Plains State Park, Alabaster Caverns and the scenic gypsum hills.

Don’t miss the crystal-digging experience — it’s one of the most unusual and memorable things you can do in Oklahoma. Arrive at the refuge headquarters early to get your free permit (April 1–October 15 only), bring old clothes and shoes (you’ll get salty and muddy), a spoon or small hand scoop (no shovels), a container for your crystals, and plenty of water. Dig just a few inches below the surface and sift the wet sand gently to find the hourglass selenite crystals. Then drive the wildlife auto tour and set up your spotting scope for the shorebirds, cranes and (if you’re lucky) whooping cranes.