Crystal Glen Creek: Geode Digging in Hancock County, Illinois

Updated June 2026

Crystal Glen Creek is a mapped rockhounding spot in Hancock County, Illinois. Reported finds include geode, barite, calcite, dolomite, goethite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Hancock County
State: Illinois
Nearest road: North County Road 700
Postcode: 62379
Coordinates: 40.37142, -91.37545

Geology at Crystal Glen Creek

This spot sits on Meppen Limestone, Fern Glen Formation, and Burlington-Keokuk Limestone, mapped as limestone that formed roughly 360 to 330 million years ago. Limestone country like this is classic geode ground: cavities in the carbonate rock can line themselves with quartz or calcite crystals.

Mapped unit: Meppen Limestone, Fern Glen Formation, and Burlington-Keokuk Limestone
Age: 360–330 Ma (Mississippian)
Rock types: limestone
Elevation: 560 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.

Best time to visit Crystal Glen Creek

Best months: March to November. Typical highs run 85°F in midsummer and 33°F in midwinter, with winter lows near 17°F.

Climate normals: NOAA 1991-2020 monthlies, KEOKUK L&D 19 station (2 mi away).

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.

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.

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.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Crystal Glen Creek

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Nearby rockhounding spots

Other rockhounding spots within driving distance of Crystal Glen Creek.

Across the state line from Crystal Glen Creek

Crystal Glen Creek is close enough to the Illinois border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Crystal Glen Creek FAQ

Where is Crystal Glen Creek?+

Crystal Glen Creek is in Hancock County, Illinois, at 40.37142, -91.37545. Nearest road: North County Road 700.

What rocks and minerals can you find at Crystal Glen Creek?+

Crystal Glen Creek is reported to produce Geode, Barite, Calcite, Dolomite, Goethite, Pyrite, Quartz, Selenite.

Is collecting allowed at Crystal Glen Creek?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Crystal Glen Creek?+

Bring a crack hammer, a chisel, safety glasses, and a bucket. Candidates are rounder and lighter than solid rock; a soil pipe cutter opens them cleaner than a flat smash.

When is the best time to visit Crystal Glen Creek?+

The most comfortable months at Crystal Glen Creek are March to November.

How do I get to Crystal Glen Creek?+

Open the directions link to navigate to 40.37142, -91.37545 in Google Maps. The nearest road is North County Road 700.

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Open Crystal Glen Creek on the map

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