RockHoundR

Rockhounding in Idaho

Updated October 2026

117 mapped spots for rock hunting and rock collecting across 33 counties. Idaho is known for star garnet, opal, jasper, and agate. Emerald Creek, Spencer Opal Mines, Bruneau Canyon, and the Owyhee jasper fields are the main names to know.

Where is the best rockhounding in Idaho?

The best rockhounding in Idaho is at Emerald Creek in Shoshone County (almandine garnet), Idaho City in Boise County (quartz, garnet), and Bruneau Canyon in Owyhee County (bruneau canyon jasper). In total, 117 mapped collecting spots across 33 counties produce gold, agate, and quartz, each listed below with its land access.

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Every rockhounding spot in Idaho

Idaho rockhounding photos

Representative spot and material photos from locations in this state, shown where verified public image records are available.

5 photos

Top minerals found in Idaho

Counts reflect how many spots in this list mention each mineral.

Notable areas: Emerald Creek star garnet, Spencer opal, Bruneau jasper, and Graveyard Point plume agate are common Idaho targets.

Geology behind Idaho rockhounding

Idaho's collecting splits into three big stories: the Idaho Batholith and its garnet-bearing schists in the north (Emerald Creek); the Snake River Plain volcanics and their picture jaspers (Bruneau Canyon, Graveyard Point); and the Spencer rhyolite dome in the east, which produces the only common opal in North America with a strong play of color.

Best regions to focus your search

North Idaho (Emerald Creek, Coeur d'Alene district)

The Emerald Creek Garnet Area near Clarkia is a USFS permit dig for Idaho star garnet. The Silver Valley also has mine dump material, subject to access and claim status.

Snake River Plain (Bruneau, Owyhee)

Bruneau jasper, Graveyard Point plume agate, and McDermitt opal across the Idaho/Oregon line. Most ground is BLM with long approach drives.

Eastern Idaho (Spencer, Bear Lake)

Spencer opal at fee-dig mines, the only common opal mine in the U.S. that produces play-of-color material. Closed in winter.

Best season

Emerald Creek: open Memorial Day through Labor Day under USFS permit hours. Spencer opal: open seasonally Memorial Day through early September. South Idaho jasper country: April–October.

What to bring

Emerald Creek: USFS supplies tools and a screen; bring rain gear and waterproof boots. Spencer: bring a screen, a hammer, and patience. Bruneau Canyon: 4WD high-clearance and full-size spare; the canyon is remote.

Local collecting history

The star garnet was named Idaho's state gem in 1967. Spencer opal was discovered in the early 1960s when two deer hunters spotted opalized rhyolite on a hillside near the Montana border, the deposit has been a fee dig ever since.

Rockhounding near major Idaho cities

Day-trip range. Each section lists the closest mapped rockhounding spots within about 150 miles of the city. Most are inside a 2 to 3 hour drive.

Rockhounding near Boise

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6 closest spots to Boise, ID.

  • Shafer CreekBoise County · Feldspar15 mi19 min drive
  • Ada CountyAda County · Agate, Chalcedony16 mi20 min drive
  • EmmettGem County · Blue Agate, Opal24 mi30 min drive
  • Idaho CityBoise County · Quartz, Garnet24 mi30 min drive
  • SweetGem County · Agate29 mi37 min drive
  • Garden ValleyBoise County · Aquamarine35 mi44 min drive

Rockhounding near Idaho Falls

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6 closest spots to Idaho Falls, ID.

  • Camas CreekJefferson County · Topaz, Fire Opal37 mi47 min drive
  • Moonlight MineBannock County · Bornite, Chalcocite44 mi55 min drive
  • Big Lost RiverButte County · Geode, Amethyst46 mi57 min drive
  • Lane’s CreekCaribou County · Hematite54 mi1 hr 7 min drive
  • Crystal ButteFremont County · Andesine58 mi1 hr 12 min drive
  • Spencer Opal MineClark County · Fire Opal61 mi1 hr 16 min drive

Rockhounding near Pocatello

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6 closest spots to Pocatello, ID.

  • Moonlight MineBannock County · Bornite, Chalcocite8 mi11 min drive
  • Bear RiverFranklin County · Psilomelane, Pyrolusite53 mi1 hr 6 min drive
  • Lane’s CreekCaribou County · Hematite59 mi1 hr 14 min drive
  • SnowvilleBox Elder County · Variscite63 mi1 hr 19 min drive
  • Big Lost RiverButte County · Geode, Amethyst67 mi1 hr 24 min drive
  • MontpelierBear Lake County · Gypsum72 mi1 hr 31 min drive

Neighboring states with rockhounding

Geology rarely respects state borders. These states share mapped rockhounding country with Idaho, useful when Idaho is the start, not the whole trip. Each card links to the closest county across the line.

Rockhounding by county in Idaho

County pages are linked once we have at least 3 mapped spots for a focused guide with coordinates, mineral notes, and nearby spots.

Top picks in Idaho

10 best spots

Hand-picked standouts from the Idaho list, chosen for unusual mineralogy, documented public access, or both. Each card links to coordinates, access notes, and what to look for.

Fee digs and gem mining in Idaho

1 place in Idaho where you pay to dig and keep what you find. Prices and seasons change, so check with the operator before you drive out.

  • Spencer Opal MineClark CountyFire Opal

Rock and mineral clubs in Idaho

7 clubs in Idaho. Clubs run field trips, shows and workshops, and many trips go to private claims you can't reach alone.

Full club directory →

Idaho rockhounding FAQ

Is rockhounding legal in Idaho?+
Yes on BLM and USFS land under the BLM 25 lb/day, 250 lb/year rule. Yellowstone NP, Craters of the Moon, Idaho State Parks, and tribal lands are closed. Emerald Creek requires a USFS fee permit.
How does the Emerald Creek star garnet dig work?+
The Emerald Creek Garnet Area is run by the Idaho Panhandle National Forests. Pay a daily permit at the entrance, receive a five-gallon-bucket limit, and dig in a sluice trough provided by USFS staff. You sort wet gravel for star garnets. Most are pebble size but some are walnut-size cabochon-grade stones.
Where can I find opal in Idaho?+
Spencer Opal Mines near the Idaho/Montana border is the only producing fee-dig common-opal-with-play-of-color site in the United States. Open seasonally. The surrounding rhyolite hills are mostly patented claims, stick to the mine.
What's the BLM limit in Idaho?+
Up to 25 pounds per day plus one piece, with a 250-pound annual cap per person, applied to common rocks, mineral specimens, and semiprecious gemstones. The cap is separate from petrified wood, which has its own 25 lb/day, 250 lb/year limit.
What rocks and minerals can you find in Idaho?+
Common targets include star garnet (Emerald Creek), Spencer opal, Bruneau jasper, Graveyard Point plume agate, McDermitt opal, agate float across BLM Owyhee country, and mine-dump minerals in the Silver Valley.
Where can I go rock hunting in Idaho?+
Rock hunting, rock collecting and rockhounding are the same hobby under different names. 117 spots are mapped in Idaho, 104 of them with public access. Idaho County, Owyhee County, and Custer County have the most.
Is there gem mining or pay-to-dig in Idaho?+
Yes. 1 fee dig is mapped in Idaho, where you pay to dig and keep what you find: Spencer Opal Mine. Prices and seasons change, so check with the operator before you drive out.
Where can I dig for crystals in Idaho?+
13 mapped spots in Idaho report quartz, amethyst, or smoky quartz, mostly in Bonner County, Butte County, and Idaho County. Each one is in the list on this page with its land access.
Can you find geodes in Idaho?+
Yes. 4 mapped spots in Idaho report geodes, mostly in Butte County, Blaine County, and Twin Falls County.
Where can I go gold panning in Idaho?+
23 mapped spots in Idaho report gold, mostly in Shoshone County, Clearwater County, and Idaho County. Check for mining claims before you pan: working someone else's claim is not allowed.
Where can I go fossil hunting in Idaho?+
1 mapped spot in Idaho reports fossils, mostly in Bear Lake County. On federal land you may keep common shells, corals and plant fossils. Bones and teeth of animals with a backbone are protected.

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