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

Andre-Horse Creek Placer (Occurrence)Unnamed Molybdenum Occurrence (Occurrence)Pine Creek (Past Producer)Three Musketeers (Past Producer)Miller Lode + 1 more nearby (Past Producer)Three Musketeers Feldspar Lode (Past Producer)Unnamed Copper Prospect (Occurrence)Unnamed Copper Prospect (Occurrence)Princeton A N H K (Past Producer)Princeton Group (Past Producer)Devils Head Prospect + 4 more nearby (Past Producer)California Quarry (Past Producer)California Lode (Past Producer)Devils Head Pegmatite District (Producer)Fern Cr. + 2 more nearby (Producer)Kaminski Prospect (Occurrence)Cramer Quarry + 4 more nearby (Past Producer)Watson Park Quarry + 2 more nearby (Past Producer)Skeleton No. 2 Quarry + 3 more nearby (Past Producer)Baldwin (Producer)Lone Pine Feldspar Quarry + 2 more nearby (Past Producer)Lone Pine Pegmatite (Occurrence)Penley No.1 Lease (Occurrence)Three Muskateers (Producer)Rusty Pick (Occurrence)Denver Quarry + 5 more nearby (Past Producer)Baldwin Mine + 1 more nearby (Occurrence)Lost Dutchman Quarry + 3 more nearby (Past Producer)Louviers Plant + 1 more nearby (Producer)Penley No. 1 Lease (Unknown)Saddle Rock Ranch (Past Producer)Devils Head Copper (Past Producer)Churchill (Past Producer)Higginson Pit (Past Producer)Happy Canyon Creek Gold Occurrence (Occurrence)Newlin Gulch Placer + 1 more nearby (Occurrence)Newlin Gulch Gold Occurrence (Occurrence)Unnamed Gold Occurrence (Occurrence)Leonard Mine (Unknown)Unnamed Gold Occurrence + 1 more nearby (Occurrence)Unnamed Gold Occurrence (Occurrence)Unnamed Gold Occurrence (Occurrence)Russellville Gulch Placer (Past Producer)R E Coulter (Past Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
44 paw pins; nearby sites are grouped into one pin. Hover or tap a pin for the site name. 3 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

Devils Head Pegmatite District

We picked it because its USGS record mentions 3 gem or collectible minerals (Quartz, Garnet, Fluorite) and 5 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as producer for Feldspar, Quartz. Minerals mentioned: Quartz, Garnet, Mica, Feldspar, Fluorite. Approx. location 39.261, -105.101. 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?

46
Past Producer

Produced ore or material at some point in the past.

20
Occurrence

The mineral was noted here, without development.

7
Producer

Was producing when the record was made.

4
Unknown

Status not recorded.

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

Microcline 15Gold 10Quartz 7Silver 5Biotite 4Pyrochlore 2Chalcopyrite 2Chrysocolla 2Conichalcite 2Malachite 2Tenorite 2Fluorite 2

Commodities

Feldspar 40Quartz 11Gold 5Fluorine-Fluorite 5Gemstone 4Mica 4Copper 3REE 3Niobium (Columbium) 2Uranium 2

Sites (first 40)

SiteCommodityMinerals recordedStatusApprox. location
Devils HeadGemstoneAmazonstone, TopazOccurrence39.251, -105.121
Rusty PickFeldspar, Mica, Fluorine-FluoriteBiotite, FeldsparOccurrence39.208, -105.046
Three MuskateersREE, Mica, Feldspar, Fluorine-Fluorite, QuartzBiotite, Fluorite, Monazite, QuartzProducer39.282, -105.043
Fern Cr.Quartz, Mica, Fluorine-Fluorite, FeldsparBiotite, Fluorite, QuartzProducer39.164, -105.102
Little AnnaFeldspar, Quartz, MicaBiotite, QuartzProducer39.222, -105.064
Penley No.1 LeaseUraniumCarnotiteOccurrence39.394, -105.032
Unnamed Copper ProspectCopperChalcopyrite, Chrysocolla, Conichalcite, Malachite, TenoriteOccurrence39.422, -105.107
Unnamed Copper ProspectCopperChalcopyrite, Chrysocolla, Conichalcite, Malachite, TenoriteOccurrence39.446, -105.115
Kaminski ProspectUraniumEuxeniteOccurrence39.428, -105.076
Newlin Gulch Gold OccurrenceGoldGoldOccurrence39.517, -104.808
Andre-Horse Creek Placer—GoldOccurrence39.242, -105.213
Newlin Gulch PlacerGoldGoldOccurrence39.485, -104.835
Russellville Gulch PlacerGoldGoldPast Producer39.347, -104.699
Cherry Creek PlacersGoldGoldPast Producer39.595, -104.813
Unnamed Gold Occurrence—Gold, SilverOccurrence39.314, -104.729
Unnamed Gold Occurrence—Gold, SilverOccurrence39.388, -104.787
Unnamed Gold Occurrence—Gold, SilverOccurrence39.372, -104.749
Unnamed Gold Occurrence—Gold, SilverOccurrence39.391, -104.757
Happy Canyon Creek Gold Occurrence—Gold, SilverOccurrence39.513, -104.868
Denver QuarryFeldsparMicroclinePast Producer39.196, -105.041
Miller LodeFeldsparMicroclinePast Producer39.281, -105.127
Spielman QuarryFeldsparMicroclinePast Producer39.160, -105.041
Cramer No. 2 QuarryFeldsparMicroclinePast Producer39.290, -105.056
Watson Park QuarryFeldsparMicroclinePast Producer39.229, -105.070
Cramer QuarryFeldsparMicroclinePast Producer39.288, -105.055
Baldwin MineFeldsparMicroclineOccurrence39.187, -105.053
Lone Pine Feldspar QuarryFeldsparMicroclinePast Producer39.157, -105.058
Three Musketeers Feldspar LodeFeldsparMicroclinePast Producer39.278, -105.147
Princeton GroupFeldsparMicroclinePast Producer39.279, -105.103
Lost Dutchman QuarryFeldsparMicroclinePast Producer39.160, -105.041
Little Eddy QuarryFeldsparMicroclinePast Producer39.189, -105.053
California QuarryFeldsparMicrocline, PyrochlorePast Producer39.317, -105.079
Skeleton No. 2 QuarryQuartz, FeldsparMicrocline, QuartzPast Producer39.218, -105.067
Devils Head Pegmatite DistrictFeldspar, QuartzMicrocline, QuartzProducer39.261, -105.101
Unnamed Molybdenum Occurrence—MolybdeniteOccurrence39.165, -105.200
Leonard MineManganesePsilomelaneOccurrence39.391, -104.753
Lone Pine PegmatiteNiobium (Columbium), ThoriumPyrochlore, ThoriteOccurrence39.150, -105.067
Little EagleFeldspar, QuartzQuartzOccurrence39.294, -105.064
BaldwinFeldspar, QuartzQuartzProducer39.179, -105.064
Devils Head ProspectGemstone—Past Producer39.257, -105.116

Fossil collections

The Paleobiology Database lists 6 fossil collection records in Douglas County. These are research records, not public dig sites.

Nearby counties

Elbert County · Arapahoe County · Jefferson County · Denver County · El Paso County

Colorado mineral guides

Back to all Colorado 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