Holy Terror Mine Keystone Hoard

Sun shading (lidar)

Adjust simulated sun direction on the lidar hillshade. Azimuth = compass bearing of the light (0° north, 90° east). Altitude = height above the horizon (low = long shadows).

Historical map overlays

USGS scanned historical topographic maps. Enable an overlay and adjust its opacity. Works in 2D and 3D.

Sun azimuth: 315°   Sun altitude: 45°   Z factor: 1   Lidar opacity: 1
center: —   mouse: —   zoom: —

Holy Terror Mine Keystone Hoard

Lost Treasure SD • Pennington County County
Description
Keystone legend that the Holy Terror Mine still holds an unfound treasure somewhere in the old workings — one of the Black Hills' best-known lost-mine names on the quartz-filled slopes near Mount Rushmore country.
Historical Notes
Pennington County treasure compilations single out the Holy Terror as a mine where bullion or specimen gold may remain sealed in collapsed tunnels. Keystone rose as a quartz-mining camp after the 1876 rush, with the Holy Terror among its dramatic mine names. Coordinates center on Keystone as the anchor for Holy Terror lost-ore folklore.
Status / Verification legend — Legendary or approximate

Take Add Data / Take Notes

Log in or create an account to save private field notes for this location. Your notes are only visible to you.

Forgot password?
or

Enter your email and we'll send you a link to reset your password.

Back to log in
or