{
 "source": "Rare Earth Directory",
 "url": "https://rareearthdirectory.com",
 "verified": "2026-10-01",
 "license": "Free to use with attribution to the Rare Earth Directory",
 "rows": [
  {
   "slug": "mountain-pass",
   "name": "Mountain Pass (Mountain Pass Rare Earth Mine)",
   "state": "California",
   "place": "San Bernardino County",
   "status": "Producing rare earths",
   "owner": "MP Materials (NYSE: MP)",
   "deposit": "Carbonatite; bastnaesite",
   "contained_treo_mt": 1.9,
   "contained_treo_computed": false,
   "grade_pct_treo": 5.98,
   "next_milestone": "Heavy rare earth (Dy and Tb) output expected later in 2026",
   "approx_lat": 35.4766,
   "approx_lng": -115.5311,
   "confidence": "High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/mountain-pass/"
  },
  {
   "slug": "brook-mine",
   "name": "Brook Mine (Ramaco)",
   "state": "Wyoming",
   "place": "Sheridan County (near Ranchester)",
   "status": "Development",
   "owner": "Ramaco Resources (Nasdaq: METC)",
   "deposit": "Coal-hosted unconventional deposit",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Interim revised economics by end of 2026; pre-feasibility study in 2027; first production targeted 2031",
   "approx_lat": 44.92,
   "approx_lng": -107.1,
   "confidence": "Medium-High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/brook-mine/"
  },
  {
   "slug": "round-top",
   "name": "Round Top",
   "state": "Texas",
   "place": "Hudspeth County (near Sierra Blanca)",
   "status": "Development",
   "owner": "USA Rare Earth (Nasdaq: USAR), 100% after acquiring Texas Mineral Resources (closed Aug 2026)",
   "deposit": "Peralkaline rhyolite; yttrofluorite and xenotime; heavy-rare-earth rich",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Definitive feasibility study due Q4 2026; commercial production target 2028",
   "approx_lat": 31.28,
   "approx_lng": -105.42,
   "confidence": "High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/round-top/"
  },
  {
   "slug": "halleck-creek",
   "name": "Halleck Creek (Cowboy State Mine)",
   "state": "Wyoming",
   "place": "Albany County (northeastern; central Laramie Mountains)",
   "status": "Development",
   "owner": "American Rare Earths Ltd (ASX: ARR)",
   "deposit": "A-type granite; allanite",
   "contained_treo_mt": 8.7,
   "contained_treo_computed": false,
   "grade_pct_treo": 0.3292,
   "next_milestone": "Pre-feasibility study targeted Q3 2026; permit-to-mine filing late 2026",
   "approx_lat": 41.55,
   "approx_lng": -105.25,
   "confidence": "Medium-High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/halleck-creek/"
  },
  {
   "slug": "bear-lodge",
   "name": "Bear Lodge (Bull Hill Mine)",
   "state": "Wyoming",
   "place": "Crook County (near Sundance; Black Hills National Forest)",
   "status": "Development",
   "owner": "Rare Element Resources (OTCQB: REEMF)",
   "deposit": "Carbonatite; bastnaesite",
   "contained_treo_mt": 0.497,
   "contained_treo_computed": true,
   "grade_pct_treo": 3.05,
   "next_milestone": "Federal permitting scheduled to finish Mar 2028 (FAST-41)",
   "approx_lat": 44.5,
   "approx_lng": -104.45,
   "confidence": "High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/bear-lodge/"
  },
  {
   "slug": "elk-creek",
   "name": "Elk Creek",
   "state": "Nebraska",
   "place": "Johnson County (southeast Nebraska)",
   "status": "Development",
   "owner": "NioCorp Developments (Nasdaq: NB)",
   "deposit": "Carbonatite; niobium-scandium-titanium with magnet rare earths",
   "contained_treo_mt": 1.04,
   "contained_treo_computed": false,
   "grade_pct_treo": 0.3,
   "next_milestone": "Construction start targeted Dec 2026, subject to EXIM financing",
   "approx_lat": 40.33,
   "approx_lng": -96.15,
   "confidence": "Medium-High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/elk-creek/"
  },
  {
   "slug": "bokan-mountain",
   "name": "Bokan Mountain (Dotson Ridge area)",
   "state": "Alaska",
   "place": "Prince of Wales Island",
   "status": "Exploration",
   "owner": "Ucore Rare Metals (TSXV: UCU)",
   "deposit": "Peralkaline complex; allanite, bastnaesite, monazite, xenotime; heavy-rare-earth rich",
   "contained_treo_mt": 0.03,
   "contained_treo_computed": true,
   "grade_pct_treo": 0.58,
   "next_milestone": "No mine schedule; Ucore focuses its near-term US effort on a Louisiana processing complex",
   "approx_lat": 55.1,
   "approx_lng": -132.1,
   "confidence": "Medium-High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/bokan-mountain/"
  },
  {
   "slug": "sheep-creek",
   "name": "Sheep Creek",
   "state": "Montana",
   "place": "Ravalli County (Bitterroot National Forest)",
   "status": "Exploration",
   "owner": "US Critical Materials (private)",
   "deposit": "Carbonatite; bastnaesite, allanite, monazite",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Forest Service review of a reduced plan filed Jun 12, 2026; decision estimated Jul 2027",
   "approx_lat": 45.9,
   "approx_lng": -114.2,
   "confidence": "Medium",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/sheep-creek/"
  },
  {
   "slug": "lemhi-pass",
   "name": "Lemhi Pass",
   "state": "Idaho / Montana",
   "place": "Lemhi County, ID and Beaverhead County, MT (about 25 miles southeast of Salmon, ID)",
   "status": "Exploration",
   "owner": "Idaho Strategic Resources (NYSE American: IDR)",
   "deposit": "Thorium-rare earth vein district",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Permitting and drill targeting for 2026 and beyond; no resource estimate",
   "approx_lat": 44.97,
   "approx_lng": -113.45,
   "confidence": "Medium",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/lemhi-pass/"
  },
  {
   "slug": "diamond-creek",
   "name": "Diamond Creek",
   "state": "Idaho",
   "place": "Lemhi County, ID",
   "status": "Exploration",
   "owner": "Idaho Strategic Resources (NYSE American: IDR)",
   "deposit": "Thorium-rare earth belt; yttrium-rich",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Bulk sampling and mineralogical studies in H2 2026; no resource estimate",
   "approx_lat": 45.2,
   "approx_lng": -113.95,
   "confidence": "Medium",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/diamond-creek/"
  },
  {
   "slug": "la-paz",
   "name": "La Paz",
   "state": "Arizona",
   "place": "La Paz County (~170 km NW of Phoenix)",
   "status": "Exploration",
   "owner": "American Rare Earths Ltd (ASX: ARR)",
   "deposit": "Allanite-bearing; low grade",
   "contained_treo_mt": 0.067,
   "contained_treo_computed": true,
   "grade_pct_treo": 0.0391,
   "next_milestone": "Historic-data and metals-potential review continues through 2026",
   "approx_lat": 34.1,
   "approx_lng": -113.9,
   "confidence": "Medium",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/la-paz/"
  },
  {
   "slug": "colosseum",
   "name": "Colosseum (Mojave National Preserve)",
   "state": "California",
   "place": "San Bernardino County (Mojave National Preserve; about 10 km north of Mountain Pass)",
   "status": "Exploration",
   "owner": "Dateline Resources (ASX: DTR)",
   "deposit": "Gold-first project with rare earth potential",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Court hearing on stay motions Oct 26, 2026; injunction in force since Aug 10",
   "approx_lat": 35.57,
   "approx_lng": -115.55,
   "confidence": "Medium",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/colosseum/"
  },
  {
   "slug": "silicon-ridge",
   "name": "Silicon Ridge",
   "state": "Utah",
   "place": "Lake Mountains, Utah County (Utah state trust land)",
   "status": "Exploration",
   "owner": "Ionic Mineral Technologies (private, Provo, UT)",
   "deposit": "Halloysite-hosted ion-adsorption clay",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Further drilling and studies; no rare earth grade published for the maiden estimate",
   "approx_lat": 40.2,
   "approx_lng": -111.96,
   "confidence": "Medium (company-reported)",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/silicon-ridge/"
  },
  {
   "slug": "white-mesa-mill",
   "name": "White Mesa Mill (Energy Fuels)",
   "state": "Utah",
   "place": "San Juan County (near Blanding)",
   "status": "Processing / manufacturing (operating)",
   "owner": "Energy Fuels (NYSE American: UUUU; TSX: EFR)",
   "deposit": "Monazite separation and uranium mill",
   "contained_treo_mt": "",
   "contained_treo_computed": false,
   "grade_pct_treo": "",
   "next_milestone": "Heavy rare earth expansion under construction since Jul 29, 2026; Tb and Dy circuits due end of 2027",
   "approx_lat": 37.51,
   "approx_lng": -109.48,
   "confidence": "High",
   "last_verified": "2026-10-01",
   "url": "https://rareearthdirectory.com/rare-earth-mines-in-the-us/white-mesa-mill/"
  }
 ]
}