RockWoof
Check access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.

Sketch map

Dry Gulch (Unknown)Cowley (Occurrence)Dry Creek #2 + 1 more nearby (Occurrence)Yellowtail Mine (Producer)Gypsum Creek Area (Past Producer)Lovell Deposit #2 (Producer)Lovell (Occurrence)Crooked Creek Group + 1 more nearby (Occurrence)Bighorn Bentonite Co. Claims (Occurrence)Ryan Consolidated Claims (Producer)Whitehead Claims (Occurrence)Lovell Deposit #1 (Producer)Marvel Mine + 3 more nearby (Occurrence)Northwest of Greybull (Producer)Mike #10 + 12 more nearby (Occurrence)Morris Avery + 10 more nearby (Occurrence)Midnight (Past Producer)Asay-Egbert Prospects + 2 more nearby (Occurrence)Amsden Property (Prospect)Anomaly No 1 (Unknown)Mike Claims + 7 more nearby (Occurrence)Mike 1-10 + 1 more nearby (Past Producer)Lovell Mines (Producer)Big Horn River (Unknown)Egbert + 1 more nearby (Occurrence)Anomaly #1 (Occurrence)Robertson Claim-No.1 (Prospect)Big Horn River Area + 1 more nearby (Unknown)Greybull Area #3 (Producer)Robertson Claim-No.1 (Prospect)Wyo-Ben Products + 1 more nearby (Past Producer)Dresser Bentonite Mine + 3 more nearby (Producer)Bear Creek #2 (Unknown)North-East of Greybull + 1 more nearby (Producer)End of Day & Sun Up Claims No.4 + 1 more nearby (Prospect)Greybull Area #1 (Producer)Shell Canal (Unknown)Porcupine Group (Prospect)Sunup Group + 4 more nearby (Occurrence)Reeves Ranch + 1 more nearby (Occurrence)L.E.Collingwood Bent.Mine & Mill + 2 more nearby (Producer)Porter Gulch Area (Producer)Lucky Strike + 2 more nearby (Occurrence)Wildcat Group + 7 more nearby (Occurrence)Big Hill Group + 2 more nearby (Occurrence)Anomaly #4 + 1 more nearby (Occurrence)Anomaly No. 3 (Occurrence)Burgess Claim (Unknown)Burgess Claim (Unknown)Spanish Point Agate Mine (Prospect)Soldier Creek Prospect (Occurrence)Claim Area (Unknown)
Past ProducerProducerProspectOccurrenceStatus unknown
52 paw pins; nearby sites are grouped into one pin. Hover or tap a pin for the site name. 4 site(s) with USGS coordinates outside the outline are not pinned. County outline: US Census Bureau cartographic boundary file (2023). Locations approximate.

Woof’s favorite find

Bald Mountain Placer Claims

We picked it because its USGS record mentions 1 gem or collectible mineral (Gold) and 1 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as prospect for Gold. Minerals mentioned: Gold. Approx. location 44.816, -107.812. USGS record.

Ask first: a USGS record doesn’t mean you can visit. Find out who owns the land and get permission before collecting.

Field cards: what kind of sites?

37
Occurrence

The mineral was noted here, without development.

31
Unknown

Status not recorded.

21
Past Producer

Produced ore or material at some point in the past.

18
Producer

Was producing when the record was made.

13
Prospect

Explored or test-dug, with no recorded production.

Status terms come from USGS MRDS records.

Mineral cards

Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.

Minerals recorded here

Tyuyamunite 2Monazite 1

Commodities

Uranium 85Bentonite 29Titanium-Heavy Minerals 2Zirconium 1Thorium 1Semiprecious Gemstone 1Potassium 1Potash 1Gold 1REE 1

Sites (first 40)

SiteCommodityMinerals recordedStatusApprox. location
Porcupine GroupREE, BerylliumMonaziteProspect44.845, -107.891
Ryan Consolidated ClaimsUraniumTyuyamuniteProducer44.993, -108.239
Jet Claims, Modern ClaimsUraniumTyuyamunitePast Producer44.993, -108.168
Marvel MineUranium—Occurrence44.689, -108.241
Asay-Egbert ProspectsUranium—Occurrence44.689, -108.241
Morris AveryUranium—Occurrence44.978, -108.188
Mike #10Uranium—Occurrence44.994, -108.180
Smith-PaulesonUranium—Occurrence44.994, -108.180
Mike ClaimsUranium—Occurrence44.994, -108.159
Horseshoe 9-10Uranium—Occurrence44.965, -108.200
Crooked Creek GroupUranium—Occurrence44.978, -108.300
Anomaly No. 3Uranium—Occurrence44.320, -107.652
Big Hill GroupUranium—Occurrence44.511, -107.791
Wildcat GroupUranium—Occurrence44.494, -107.833
Reeves RanchUranium—Occurrence44.494, -107.874
Lucky StrikeUranium—Occurrence44.557, -107.812
Big Hill GroupUranium—Occurrence44.528, -107.812
Anomaly #1Uranium—Occurrence44.564, -108.167
Sunup GroupUranium—Occurrence44.658, -107.871
EgbertUranium—Occurrence44.689, -108.160
CowleyTitanium-Heavy Minerals—Occurrence44.858, -108.481
LovellZirconium, Titanium-Heavy Minerals, Thorium—Occurrence44.759, -108.348
Anomaly #4Uranium—Occurrence44.349, -107.652
Gypsum Creek AreaBentonite—Past Producer44.978, -108.362
Smith Property & Lucky Strike ClaimUranium—Prospect44.557, -107.812
Shell CanalBentonite—Unknown44.511, -107.957
Bear Creek #1Bentonite—Unknown44.658, -109.056
Dry Creek Group No.3Uranium—Occurrence44.687, -108.238
Anomaly #6Uranium—Occurrence44.863, -107.542
Dirty BeastUranium—Prospect44.999, -108.183
CrystalBentonite—Unknown42.536, -108.055
Claim AreaUranium—Unknown44.204, -107.201
Big Hill GroupUranium—Occurrence44.528, -107.813
Shell Creek ProspectUranium—Past Producer44.494, -107.852
Asay-Egbert ProspectsUranium—Occurrence44.687, -108.217
Super Cub MineUranium—Past Producer44.993, -108.198
Mudstone ClaimsUranium—Unknown44.494, -107.852
Big Hill GroupUranium—Occurrence44.511, -107.792
Lisbon MinesUranium—Unknown44.993, -108.156
Reeves RanchUranium—Unknown44.494, -107.867

Fossil collections

The Paleobiology Database lists 214 fossil collection records in Big Horn County. These are research records, not public dig sites.

Nearby counties

Sheridan County · Washakie County · Park County · Hot Springs County · Johnson County

Wyoming mineral guides

Back to all Wyoming counties.

Related articles

How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.

Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.

Updated