Where to Find Jasper in Idaho

Idaho has 6 mapped collecting spots that report jasper, spread across 5 counties. The largest share sits in Blaine County County with 2 spots. 6 of the spots are on land mapped as publicly accessible.

Spot list checked against source data on April 1, 2026.

Standout jasper spots in Idaho

Hand-picked from the full list below, with the reason each one earns a trip.

Little Wood River
Blaine County County
Little Wood River is the strongest Blaine County pick because the same drainage is listed for green and moss agate by Idaho Department of Lands and has Mindat specimen records from the Little Wood Reservoir area. Its agate, chalcedony, and jasper add a useful south-central Idaho counterpoint to the better-known Owyhee localities.

Best counties for jasper in Idaho

Ranked by the number of mapped jasper spots. County links open the full rockhounding page for that county.

Every jasper spot we track in Idaho

Sorted by county. Coordinates open in Google Maps.

Spot	County	Minerals	Coordinates	Access
Ada CountySouth Pleasant Valley Road	Ada County	Agate Chalcedony Jasper Petrified Wood Opalized Wood	43.3845, -116.2326	Public
CareyUS 93;US 26	Blaine County	Jasper Moss Agate	43.2387, -113.9657	Public
Little Wood River	Blaine County	Agate Chalcedony Jasper	43.3925, -113.9974	Public
Salmon RiverSalmon River Trail #96	Idaho County	Agate Chalcedony Jasper Petrified Wood	45.4632, -115.7870	Public
Clearwater RiverUS 12;US 95	Nez Perce County	Agate Jasper Chert Fibrolite	46.4335, -116.9515	Public
Bruneau DesertBalanced Rock Road	Owyhee County	Agate Chalcedony Jasper	42.5729, -115.1896	Public

Before you go

Read the jasper identification guide so you know what a keeper looks like in the field: Jasper in the encyclopedia.

Jasper in Idaho FAQ

Where can you find jasper in Idaho?+

The mapped spots concentrate in Blaine County County, Ada County County, and Idaho County County. Every spot on this page appears on the map above with coordinates and access notes.

How many jasper spots are mapped in Idaho?+

6 spots across 5 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.

Is it legal to collect jasper in Idaho?+

Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 6 of the 6 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find jasper

More minerals to hunt in Idaho

Hunt jasper in Idaho with the map in your pocket

RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.