Where to Find Agates near Sheridan, WY
20 of the mapped rockhounding spots within 150 miles of Sheridan report agate. The closest is Buffalo, about 31 miles out (39 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 Sheridan
BuffaloJohnson County, Wyoming · 31 mi awayPermission required · Agate, Chalcedony, Gastrolith +3- Big Horn CanyonBig Horn County, Montana · 61 mi awayPermission required · Agate, Chalcedony, Jasper +2
- Big Horn RiverBig Horn County, Wyoming · 64 mi awayPermission required · Dry Head Agate
Best spotPryor MountainsBig Horn County, Montana · 71 mi awayPermission required · Fossil, Agate, Chalcedony +2- WorlandWashakie County, Wyoming · 74 mi awayPermission required · Agate, Chalcedony, Red Jasper +2
Bear CanyonCarbon County, Montana · 79 mi awayPublic access · Geode, Agate- HyshamTreasure County, Montana · 96 mi awayPublic access · Moss Agate
- Yellowstone River - Bundy Bridge Fishing AccessYellowstone County, Montana · 97 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
- Yellowstone River - Blue Creek AccessYellowstone County, Montana · 100 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
Best spotYellowstone River (Billings area)Yellowstone County, Montana · 101 mi awayPublic access · Montana Agate, Chalcedony, Chert +1- Yellowstone River - Myers Bridge AccessTreasure County, Montana · 102 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
- Yellowstone River - Rosebud AccessRosebud County, Montana · 105 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
- MeeteetsePark County, Wyoming · 106 mi awayPublic access · Agate, Jasper
- Yellowstone River - Laurel Sportsman AccessYellowstone County, Montana · 108 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
- Custer CountyCuster County, Montana · 122 mi awayPublic access · Montana Agate
- Yellowstone River - Holmgren Fishing AccessStillwater County, Montana · 131 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
- CasperNatrona County, Wyoming · 138 mi awayPublic access · Agate, Alabaster, Amazonite
- Poison Spider CreekNatrona County, Wyoming · 138 mi awayPublic access · Agate, Chalcedony, Jasper
- Wind River & StreamsFremont County, Wyoming · 144 mi awayPermission required · Agate, Chalcedony, Jasper
- Yellowstone River - Bratten Fishing AccessSweet Grass County, Montana · 145 mi awayPublic access · Montana Moss Agate, Petrified Wood, Jasper +1
Types of agates reported near Sheridan
Counts reflect how many spots in this radius mention each variety.
- Agate9
- Montana Moss Agate7
- Montana Agate2
- Dry Head Agate1
- Moss Agate1
Agates near Sheridan FAQ
Where can I find agates near Sheridan?+
20 mapped spots within about 150 miles of Sheridan report agate. The closest is Buffalo in Johnson County, roughly 31 miles away (39 min drive). The full list with coordinates is on this page.
Can I collect agates on public land near Sheridan?+
14 of the 20 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 Sheridan do I need to drive?+
The nearest agate spot is about 31 miles out, and the farthest on this list is 145 miles. Most fall inside a normal weekend day-trip radius.
Keep exploring from Sheridan
Where to Find Agates near other cities
Hunt agates around Sheridan 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.
