Nemaha River gravels near Humboldt: Agate Rockhounding in Richardson County, Nebraska

Updated June 2026

Nemaha River gravels near Humboldt is a mapped rockhounding spot in Richardson County, Nebraska. Reported finds include agate. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Richardson County
State: Nebraska
Nearest road: Railroad Street
Postcode: 68376
Coordinates: 40.15590, -95.95301

Geology at Nemaha River gravels near Humboldt

This spot sits on Wabaunsee Group, mapped as shale, sandstone, and limestone that formed roughly 325 to 300 million years ago. Chert and agate nodules typically form inside carbonate rock like this and weather out as tough, waxy lumps in soils and creek beds.

Mapped unit: Wabaunsee Group
Age: 325–300 Ma (Pennsylvanian)
Rock types: shale, sandstone, and limestone
Elevation: 950 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 Nemaha River gravels near Humboldt

Best months: March to November. Typical highs run 89°F in midsummer and 36°F in midwinter, with winter lows near 15°F.

Climate normals: NOAA 1991-2020 monthlies, TABLE ROCK 4N station (9 mi away), adjusted for elevation.

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 Nemaha River gravels near Humboldt

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

Agate Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Nemaha River gravels near Humboldt.

Across the state line from Nemaha River gravels near Humboldt

Nemaha River gravels near Humboldt is close enough to the Nebraska border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Nemaha River gravels near Humboldt FAQ

Where is Nemaha River gravels near Humboldt?+

Nemaha River gravels near Humboldt is in Richardson County, Nebraska, at 40.15590, -95.95301. Nearest road: Railroad Street.

What rocks and minerals can you find at Nemaha River gravels near Humboldt?+

Nemaha River gravels near Humboldt is reported to produce Agate.

Is collecting allowed at Nemaha River gravels near Humboldt?+

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 Nemaha River gravels near Humboldt?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Nemaha River gravels near Humboldt?+

The most comfortable months at Nemaha River gravels near Humboldt are March to November.

How do I get to Nemaha River gravels near Humboldt?+

Open the directions link to navigate to 40.15590, -95.95301 in Google Maps. The nearest road is Railroad Street.

More rockhounding in Nebraska

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Open Nemaha River gravels near Humboldt on the map

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