Atomic Idaho / Big Lost River Rest Area
The Reactor Plain
This marker points into the desert landscape where Idaho National Laboratory grew into a major nuclear reactor testing ground.
- Category
- Atomic Idaho
- Era
- Post-1949
- Coordinates
- 43.5490, -113.0081
- Highway
- US 20
Map
Map locations are for illustrative planning only. Check the original source records, posted signs, land ownership, closures, and current conditions before visiting.
Why It Matters
The empty-looking plain hides a scientific history that shaped nuclear power, naval propulsion, and Cold War-era research.
Marker record title: Nuclear Reactors.
- Marker Number
- 297
Source: Idaho Transportation Department Historical Marker Hub. This page summarizes public marker data and adds editorial context.
Nearby records
Other Idaho Points of Interest
Primary source: Idaho Transportation Department Historical Marker Hub.