Yellowstone River: Agate & Montana Agate Rockhounding in Park County, Montana

Updated June 2026

Yellowstone River is a mapped rockhounding spot in Park County, Montana. Reported finds include agate, montana agate, moss agate, natrolite, silicified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Park County
State: Montana
Nearest road: Myers Lane
Postcode: 59047
Coordinates: 45.62849, -110.56780

Geology at Yellowstone River

This spot sits on Alluvial deposits, mapped as sand and gravel that formed within roughly the last 12,000 years. Petrified wood typically travels as tough float, and worked gravels like these are exactly where weathered pieces tend to collect.

Mapped unit: Alluvial deposits
Age: < 1 Ma (Holocene)
Rock types: sand and gravel
Elevation: 4,530 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 Yellowstone River

Best months: March to November. Typical highs run 86°F in midsummer and 38°F in midwinter, with winter lows near 19°F.

Climate normals: NOAA 1991-2020 monthlies, LIVINGSTON AP station (8 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.

State guidance last verified: April 1, 2026

BLM Montana — Recreational mineral collecting
Montana Bureau of Mines and Geology
Gem Mountain Sapphire Mine (fee-dig operator)
Community submissions reviewed against published agency rules

Found at Yellowstone River

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 Yellowstone River.

Yellowstone River FAQ

Where is Yellowstone River?+

Yellowstone River is in Park County, Montana, at 45.62849, -110.56780. Nearest road: Myers Lane.

What rocks and minerals can you find at Yellowstone River?+

Yellowstone River is reported to produce Agate, Montana Agate, Moss Agate, Natrolite, Silicified Wood.

Is collecting allowed at Yellowstone River?+

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 Yellowstone River?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Yellowstone River?+

The most comfortable months at Yellowstone River are March to November.

How do I get to Yellowstone River?+

Open the directions link to navigate to 45.62849, -110.56780 in Google Maps. The nearest road is Myers Lane.

More rockhounding in Montana

See all 87 Montana spots →

Open Yellowstone River on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.