In the United States, the first due-diligence question is land status. Federal land, National Park Service land, state land, tribal land, and private land operate under different authorities. This consolidated reference covers common marketplace questions; it does not determine title to any specimen.
Not legal advice. Rules change and vary by agency, parcel, lease, permit, and specimen type. Verify the actual collection location with the relevant land manager or qualified counsel before buying. See also our
Can You Sell Dinosaur Bones? guide.
Montana
medium riskMontana is the epicenter of the US commercial dinosaur trade — Hell Creek and Two Medicine material from private ranch land is legal to sell with landowner permission.
Formations: Hell Creek Formation · Two Medicine Formation · Morrison Formation
Public-land question: Vertebrate fossils on BLM, USFS, and NPS land cannot be collected for commercial sale. Research permits required.
Private-land question: Landowner owns fossils. Commercial collection and sale legal with written landowner agreement. This is the basis of the legitimate Hell Creek market.
- — Always confirm land type before buying MT dinosaur material
- — Demand county-level locality, not exact GPS
- — Egg Mountain and similar sites are private — verify chain of custody
Wyoming
medium riskWyoming produces Morrison and Hell Creek fossils from private ranch land. Como Bluff and the Green River Formation (fish) are historically significant.
Formations: Morrison Formation · Hell Creek Formation · Green River Formation
Public-land question: Commercial vertebrate collecting prohibited on federal land without authorization.
Private-land question: Private land fossils belong to the landowner. Written agreements standard for commercial dig programs.
- — Como Bluff area is mostly private ranch — verify landowner release
- — Green River fish from commercial quarries near Kemmerer are a legal market staple
Utah
medium riskUtah has world-famous display sites (Dinosaur NM, Cleveland-Lloyd) where collecting is banned, plus Morrison and Cedar Mountain material from private land.
Formations: Morrison Formation · Cedar Mountain Formation · Dinosaur Park Formation (near border)
Public-land question: Strict protection on NPS and many BLM paleontological resource areas. Cleveland-Lloyd / Jurassic National Monument: no collecting.
Private-land question: Private land collection legal with landowner permission. Allosaurus and sauropod material from Morrison beds appears on the market from private sources.
- — Never buy material claimed from Dinosaur National Monument
- — Grand Staircase-Escalante has special federal protections
Colorado
low riskColorado's Morrison Formation at Dinosaur Ridge and Garden Park is historically central to American paleontology. Commercial market is smaller than Montana but active on private land.
Formations: Morrison Formation · Denver Formation
Public-land question: Federal land vertebrate fossils: no commercial collection.
Private-land question: Private land fossils can be collected and sold with landowner permission.
- — Dinosaur Ridge is protected — not a commercial source
- — Denver Formation tracks and bones require provenance verification
South Dakota
medium riskSouth Dakota Hell Creek material includes some of the most famous T. rex specimens (Sue, Stan). Private land sourcing is critical.
Formations: Hell Creek Formation · Pierre Shale
Public-land question: Badlands National Park and tribal lands: strict restrictions. No commercial vertebrate collecting.
Private-land question: Private ranch Hell Creek fossils are legally sellable with landowner documentation.
- — T. rex and Triceratops from Harding and surrounding counties dominate the market
- — Tribal land fossils require separate legal review — treat as high risk
Texas
low riskTexas is known for Cretaceous track sites (Dinosaur Valley SP) and Pleistocene mammal material. Dinosaur body fossils are less common commercially than teeth from other states.
Formations: Glen Rose Formation · Woodbine Formation
Public-land question: State and federal parks: collecting prohibited.
Private-land question: Private land rules vary. Some Cretaceous and Pleistocene material collected legally.
- — Track sites are protected — not commercial sources
- — Verify any Texas dinosaur tooth provenance carefully