Where to Find Agates near Great Falls, MT
5 of the mapped rockhounding spots within 150 miles of Great Falls report agate. The closest is Jefferson River, about 134 miles out (2 hr 47 min drive).
Agates are banded chalcedony nodules that survive long after their volcanic host rock rots away, which is why they concentrate in gravel bars, beaches, and glacial deposits far from where they formed.
Every agate spot within 150 miles of Great Falls
Jefferson RiverMadison County, Montana · 134 mi awayPublic access · Agate, Chalcedony, Jasper +1- Yellowstone RiverPark County, Montana · 134 mi awayPublic access · Agate, Montana Agate, Moss Agate +2
- Yellowstone River - Pelican Fishing AccessSweet Grass County, Montana · 141 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
- Mount BlackmoreGallatin County, Montana · 143 mi awayPublic access · Agate, Chalcedony, Hyalite Opal +1
- Yellowstone River - Bratten Fishing AccessSweet Grass County, Montana · 147 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
Types of agates reported near Great Falls
Counts reflect how many spots in this radius mention each variety.
- Agate3
- Montana Moss Agate2
- Montana Agate1
- Moss Agate1
Agates near Great Falls FAQ
Where can I find agates near Great Falls?+
5 mapped spots within about 150 miles of Great Falls report agate. The closest is Jefferson River in Madison County, roughly 134 miles away (2 hr 47 min drive). The full list with coordinates is on this page.
Can I collect agates on public land near Great Falls?+
5 of the 5 spots here sit on land mapped as publicly accessible. Casual hand collecting of common rocks and minerals is allowed on most BLM and Forest Service land with limits set by the local field office; national parks and most state parks are closed to collecting. Confirm current rules with the managing agency before a trip.
What is the fastest way to spot an agate in a gravel bed?+
Look for waxy luster and translucence rather than color. Wet the stone or look right after rain: agate glows softly at thin edges when backlit, while jasper and chert stay opaque. Banding clinches it but is often hidden until the stone is cracked or tumbled.
How far from Great Falls do I need to drive?+
The nearest agate spot is about 134 miles out, and the farthest on this list is 147 miles. Most fall inside a normal weekend day-trip radius.
Keep exploring from Great Falls
Where to Find Agates near other cities
Hunt agates around Great Falls with the map in your pocket
RockHoundR shows these spots on an offline map with public land overlays, geology layers, weather, and a log for your finds.
