RockHoundR

Where to Find Agates near Madison, WI

22 of the mapped rockhounding spots within 150 miles of Madison report agate. The closest is Devil's Lake, about 28 miles out (36 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.

Open the full map

Every agate spot within 150 miles of Madison

Types of agates reported near Madison

Counts reflect how many spots in this radius mention each variety.

Agates near Madison FAQ

Where can I find agates near Madison?+
22 mapped spots within about 150 miles of Madison report agate. The closest is Devil's Lake in Sauk County, roughly 28 miles away (36 min drive). The full list with coordinates is on this page.
Can I collect agates on public land near Madison?+
18 of the 22 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 Madison do I need to drive?+
The nearest agate spot is about 28 miles out, and the farthest on this list is 150 miles. Most fall inside a normal weekend day-trip radius.

Keep exploring from Madison

All rockhounding near Madison →Crystal Hunting near Madison →Fossil Hunting near Madison →
Agates in Wisconsin (statewide) →Agates in Iowa (statewide) →Agates in Illinois (statewide) →Agates in Minnesota (statewide) →

Where to Find Agates near other cities

Hunt agates around Madison 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.

Download on the App StoreGet it on Google Play