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Castle Butte (USNM)

Rosebud County, Montana
Directions
Next site in MontanaHysham · 23 mi

Can I collect here?

Pro
See who owns this land and whether it is claimedPro shows the owner, the claim on this spot and every claim within a mile.
Read the collecting rules by land type

Based on our latest records, with claims updated from the BLM on Oct 9, 2026. Land and claims can change quickly, so check before you go.

Minerals on record here

1 mineral

Recorded here: fossil.

Nearby sites

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About Castle Butte (USNM)

Castle Butte (USNM) is a fossil collection site in Rosebud, Montana, cataloged in the Paleobiology Database. Fossils here come from the Hell Creek Formation, dated to the Maastrichtian (72.2–66 million years ago). The depositional environment is recorded as terrestrial indet. Documented finds include Edmontosaurus.

Geologic setting

Formation
Hell Creek
Geologic interval
Maastrichtian
Age
72.2–66 Ma
Depositional environment
terrestrial indet.
Recorded occurrences
1
Locality notes

near Castle Buttle, 7 mi NW of Forsyth, MT

Fossils found here

Edmontosaurus
Ornithischia · Hadrosauridae

Records and references

Data: Paleobiology Database collection 83299 (CC BY 4.0) — view the source record

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Questions about Castle Butte (USNM)

Can you collect at Castle Butte (USNM)?

It depends on who owns the land and whether a mining claim covers it. BLM land usually allows hand collecting for personal use, national parks allow none, and private land needs the owner’s permission. Pro members see the owner and any claims at this spot.

What minerals are found at Castle Butte (USNM)?

Fossil.

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Source: Paleobiology Database.