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Grasshopper Creek: Diamond Rockhounding in Beaverhead County, Montana

Updated June 2026

Grasshopper Creek is a mapped rockhounding spot in Beaverhead County, Montana. Reported finds include diamond. Below: coordinates, access notes, nearby spots, and trip-planning links.

Map showing Grasshopper Creek in Beaverhead County, Montana

Quick details

Access
Public area
State
Montana
Nearest road
Pioneer Mountains Scenic Byway

Geology at Grasshopper Creek

This spot sits on Glacial outwash deposits, mapped as sand and gravel 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
Glacial outwash deposits
Age
3 Ma to present (Pleistocene)
Rock types
sand and gravel
Elevation
6,320 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 Grasshopper Creek

Best months: April to October. Typical highs run 77°F in midsummer and 29°F in midwinter, with winter lows near 9°F.

Climate normals: NOAA 1991-2020 monthlies, JACKSON station (14 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.

State guidance last verified:

Found at Grasshopper 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 Grasshopper Creek.

Across the state line from Grasshopper Creek

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

Grasshopper Creek FAQ

Where is Grasshopper Creek?+
Grasshopper Creek is in Beaverhead County, Montana, at 45.36476, -113.12439. Nearest road: Pioneer Mountains Scenic Byway.
What rocks and minerals can you find at Grasshopper Creek?+
Grasshopper Creek is reported to produce Diamond.
Is collecting allowed at Grasshopper 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 Grasshopper Creek?+
A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.
When is the best time to visit Grasshopper Creek?+
The most comfortable months at Grasshopper Creek are April to October.
How do I get to Grasshopper Creek?+
Open the directions link to navigate to 45.36476, -113.12439 in Google Maps. The nearest road is Pioneer Mountains Scenic Byway.

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