Agate & Jasper rockhounding sites in Wyoming

Where to find agates and jasper in the U.S. — Lake Superior beaches, Ellensburg blue, Wyoming Sweetwater fields, Texas Terlingua, Mojave desert beds, and colorful chalcedony shorelines.

29 agate & jasper destinations in Wyoming.

Rockhounding sites in Wyoming — agate & jasper: 29 spots in our directory. Sort live from your phone with near me, or browse all U.S. agate & jasper rockhounding sites and the Wyoming state page.

Guides & hubs: Wyoming rockhounding guide · Agates in the USA — Sweetwater & Seminoe fields

Agate & Jasper collecting in Wyoming

Where to find agates and jasper in the U.S. — Lake Superior beaches, Ellensburg blue, Wyoming Sweetwater fields, Texas Terlingua, Mojave desert beds, and colorful chalcedony shorelines.

We currently document 29 agate & jasper collecting sites in Wyoming. Each listing includes original descriptions, visitor notes, and last-updated dates when available.

What to know before you collect

Agate & Jasper destinations in Wyoming vary widely in access, season, and legality. Some are official recreation areas; others are informal gravel bars. Read the access and safety sections on each listing — never assume collecting is allowed without checking current signage.

For trip planning beyond this filter, browse the full Wyoming state page, our guides, or use near me to sort by distance from your location.

How we research listings · Report a correction · Safety disclaimer

What to pack for agate & jasper hunting

Gravel bars, desert washes, and dry lake beds — compared gear for agate and jasper field days.

Field Gloves — Cut and abrasion protection for sharp rock and tools

Field Gloves

Cut and abrasion protection for sharp rock and tools

4 products compared

Field Backpacks — Carry tools, water, and specimens on remote dig days

Field Backpacks

Carry tools, water, and specimens on remote dig days

4 products compared

Sun Protection Shirts — Block UV rays on long days at exposed rockhounding sites

Sun Protection Shirts

Block UV rays on long days at exposed rockhounding sites

3 products compared

Hand Lenses & Loupes — Identify crystals and minerals before you haul rock home

Hand Lenses & Loupes

Identify crystals and minerals before you haul rock home

4 products compared

All gear categories →

Disclosure: Gear links may earn a commission as an Amazon Associate — at no extra cost to you. Learn more.

Atlantic City — agate rockhounding site near Wyoming, WY

AgateWY

Atlantic City

Atlantic City is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Gold, Nephrite jade, Jade, Jasper, Muscovite, Quartz crystals, Agatized wood, Opalized wood, Tourmaline. Verify land access and collecting rules before visiting.

Fee variesWyoming

Buffalo — agate rockhounding site near Wyoming, WY

AgateWY

Buffalo

Buffalo is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Gastroliths, Jasper, Petrified wood, Quartz crystals. Verify land access and collecting rules before visiting.

Fee variesWyoming

Casper — agate rockhounding site near Wyoming, WY

AgateWY

Casper

Casper is a documented mineral occurrence near WY. Reported specimens include Agate, Alabaster, Amazonite. Verify land access and collecting rules before visiting.

Fee variesWyoming

Farson — agate rockhounding site near Wyoming, WY

AgateWY

Farson

Farson is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Chert, Jasper, Quartz crystals, Silicified wood. Verify land access and collecting rules before visiting.

Fee variesWyoming

Fort Bridger — agate rockhounding site near Wyoming, WY

AgateWY

Fort Bridger

Fort Bridger is a documented mineral occurrence near WY. Reported specimens include Agate, Jasper, Silicified agate. Verify land access and collecting rules before visiting.

Fee variesWyoming

Fort Washakie — agate rockhounding site near Wyoming, WY

AgateWY

Fort Washakie

Fort Washakie is a documented mineral occurrence near WY. Reported specimens include Moss Agate, Chalcedony, Jasper. Verify land access and collecting rules before visiting.

Fee variesWyoming

Fremont County — agate rockhounding site near Wyoming, WY

AgateWY

Fremont County

Fremont County is a documented mineral occurrence near WY. Reported specimens include Sweetwater Agate, Nephrite jade, Jade. Verify land access and collecting rules before visiting.

Fee variesWyoming

Granger — agate rockhounding site near Wyoming, WY

AgateWY

Granger

Granger is a documented mineral occurrence near WY. Reported specimens include Turritella Agate. Verify land access and collecting rules before visiting.

Fee variesWyoming

Granite Mountains — chalcedony rockhounding site near Wyoming, WY

ChalcedonyWY

Granite Mountains

Granite Mountains is a documented mineral occurrence near WY. Reported specimens include Chalcedony. Verify land access and collecting rules before visiting.

Fee variesWyoming

Green Mountain — agate rockhounding site near Wyoming, WY

AgateWY

Green Mountain

Green Mountain is a documented mineral occurrence near WY. Reported specimens include Banded Agate, Moss Agate, Aventurine, Garnet, Sapphire. Verify land access and collecting rules before visiting.

Fee variesWyoming

Green River — agate rockhounding site near Wyoming, WY

AgateWY

Green River

Green River is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Jasper, Silicified wood. Verify land access and collecting rules before visiting.

Fee variesWyoming

Hartville — agate rockhounding site near Wyoming, WY

AgateWY

Hartville

Hartville is a documented mineral occurrence near WY. Reported specimens include Agate, Moss Agate, Chalcedony. Verify land access and collecting rules before visiting.

Fee variesWyoming

Jay Em — agate rockhounding site near Wyoming, WY

AgateWY

Jay Em

Jay Em is a documented mineral occurrence near WY. Reported specimens include Agate, Malachite, Onyx. Verify land access and collecting rules before visiting.

Fee variesWyoming

Kemmerer — agate rockhounding site near Wyoming, WY

AgateWY

Kemmerer

Kemmerer is a documented mineral occurrence near WY. Reported specimens include Turritella Agate, Chalcedony, Chert, Jasper, Quartz crystals, Petrified wood, Silicified wood. Verify land access and collecting rules before visiting.

Fee variesWyoming

Lander — agate rockhounding site near Wyoming, WY

AgateWY

Lander

Lander is a documented mineral occurrence near WY. Reported specimens include Agate, Jasper, Nephrite. Verify land access and collecting rules before visiting.

Fee variesWyoming

Laramie Mountains — agate rockhounding site near Wyoming, WY

AgateWY

Laramie Mountains

Laramie Mountains is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Jasper. Verify land access and collecting rules before visiting.

Fee variesWyoming

Moss Agate Hill — agate rockhounding site near Wyoming, WY

AgateWY

Moss Agate Hill

Moss Agate Hill is a documented mineral occurrence near WY. Reported specimens include Moss Agate, Chalcedony, Jasper. Verify land access and collecting rules before visiting.

Fee variesWyoming

Poison Spider Creek — agate rockhounding site near Wyoming, WY

AgateWY

Poison Spider Creek

Poison Spider Creek is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Jasper. Verify land access and collecting rules before visiting.

Fee variesWyoming

Red Desert — agate rockhounding site near Wyoming, WY

AgateWY

Red Desert

Red Desert is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Chert, Jasper, Quartz crystals, Silicified wood. Verify land access and collecting rules before visiting.

Fee variesWyoming

Rock Springs — agate rockhounding site near Wyoming, WY

AgateWY

Rock Springs

Rock Springs is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Chert, Jasper, Quartz crystals, Silicified wood. Verify land access and collecting rules before visiting.

Fee variesWyoming

Sage Hen Creek — agate rockhounding site near Wyoming, WY

AgateWY

Sage Hen Creek

Sage Hen Creek is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Jasper. Verify land access and collecting rules before visiting.

Fee variesWyoming

Seminoe Agate Area — agate rockhounding site near Sinclair, WY

AgateWY

Seminoe Agate Area

Seminoe Mountains foothills along the North Platte yield agate and jasper in road cuts and eroded slopes.

Fee variesSinclair

Steamboat Mountain — agate rockhounding site near Wyoming, WY

AgateWY

Steamboat Mountain

Steamboat Mountain is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Jasper, Petrified wood. Verify land access and collecting rules before visiting.

Fee variesWyoming

Sweetwater — agate rockhounding site near Wyoming, WY

AgateWY

Sweetwater

Sweetwater is a documented mineral occurrence near WY. Reported specimens include Sweetwater Agate. Verify land access and collecting rules before visiting.

Fee variesWyoming

Sweetwater Agate Fields — agate rockhounding site near Rock Springs, WY

AgateWY

Sweetwater Agate Fields

Wind-scoured BLM benches near Rock Springs expose moss and fortification agate nodules in sedimentary host rock.

Fee variesRock Springs

Sweetwater County — agate rockhounding site near Wyoming, WY

AgateWY

Sweetwater County

Sweetwater County is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Chert, Jasper, Petrified wood, Silicified wood, Quartz crystals, Turritella Agate. Verify land access and collecting rules before visiting.

Fee variesWyoming

Sweetwater River — agate rockhounding site near Wyoming, WY

AgateWY

Sweetwater River

Sweetwater River is a documented mineral occurrence near WY. Reported specimens include Sweetwater Agate. Verify land access and collecting rules before visiting.

Fee variesWyoming

Warm Springs — agate rockhounding site near Wyoming, WY

AgateWY

Warm Springs

Warm Springs is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Jasper, Jade, Nephrite jade, Quartz crystals, Silicified wood. Verify land access and collecting rules before visiting.

Fee variesWyoming

Wind River & Streams — agate rockhounding site near Wyoming, WY

AgateWY

Wind River & Streams

Wind River & Streams is a documented mineral occurrence near WY. Reported specimens include Agate, Chalcedony, Jasper. Verify land access and collecting rules before visiting.

Fee variesWyoming