Great Salt Plains: Selenite & Halite Rockhounding in Alfalfa County, Oklahoma

Plan your visit

Generally open to casual rockhounding

County

Alfalfa County

State

Oklahoma

Coordinates

36.71298, -98.26672

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Access note: Free public crystal digging in the designated Selenite Crystal Digging Area on Salt Plains National Wildlife Refuge, open daily from sunrise to sunset between April 1 and October 15 and closed the rest of the year for bird nesting. Dig only inside the marked area, signed in bright orange, off Garvin Road near Cherokee. The limit is ten pounds and one large cluster per person per day, and selling the crystals is prohibited. There is no shade, so bring water and a digging tool.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Best time to visit Great Salt Plains

Comfortable months (45 to 90°F highs)

Best months: September to May. Typical highs run 95°F in midsummer and 48°F in midwinter, with winter lows near 24°F. Summer heat here is intense, so carry more water than you think you need and work the early morning.

Climate normals: NOAA 1991-2020 monthlies, CHEROKEE 1SSW MESONET station (6 mi away).

Geology at Great Salt Plains

This spot sits on Terrace Deposits, mapped as coarse alluvium and fine alluvium that formed within roughly the last 3 million years. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Mapped unit

Terrace Deposits

Age

3 Ma to present (Pleistocene)

Rock types

coarse alluvium and fine alluvium

Elevation

1,150 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

• Salt Plains National Wildlife Refuge, selenite digging
• Oklahoma Geological Survey
• Ouachita National Forest
• Community submissions reviewed against published agency rules