UpToWhereWhat can you see from Nevado del Ruiz?
Its 1985 eruption triggered a lahar that buried an entire town, killing roughly 25,000 in minutes.
From Nevado del Ruiz, the terrain-limited line of sight reaches up to 425 km. The single farthest piece of visible terrain lies 425 km to the north-northeast (bearing 31°), at 1,831 m elevation. These results account for Earth's curvature and standard atmospheric refraction, computed from 30-meter resolution Copernicus GLO-30 elevation data across 2,573,751 terrain samples.
Open the interactive visibility map →Visibility by direction
The horizon is most open toward the northeast, where sightlines run 327 km on average; terrain closes the view down fastest to the west, at 109 km.
| N | 181 km | |
| NNE | 303 km | |
| NE | 327 km | |
| ENE | 183 km | |
| E | 162 km | |
| ESE | 155 km | |
| SE | 156 km | |
| SSE | 194 km | |
| S | 173 km | |
| SSW | 164 km | |
| SW | 190 km | |
| WSW | 128 km | |
| W | 109 km | |
| WNW | 141 km | |
| NW | 162 km | |
| NNW | 205 km |
Farthest named landmarks in view
409 named peaks, hills and headlands stand inside this viewshed. These are the farthest ones you could pick out on a clear day:
| Landmark | Visible distance | Direction | Elevation |
|---|---|---|---|
| Cerro Negro | 416 km | NNE · 33° | 1,762 m |
| Cerro El Viejo | 391 km | NE · 43° | 3,694 m |
| Cerro de Buey Pelado | 383 km | NE · 38° | 1,224 m |
| Loma de Ciaga | 367 km | NE · 43° | 1,931 m |
| Morro Rico | 328 km | NE · 40° | 292 m |
| Serrania Central | 307 km | NNE · 19° | 1,309 m |
About Nevado del Ruiz
Nevado del Ruiz, at 5,321 metres, is a Colombian stratovolcano infamous for the Armero tragedy. On 13 November 1985, a relatively modest eruption produced enormous lahars when magma melted the mountain's ice and snow cap. Mud, ash, and water raced down river valleys at speeds exceeding 60 kilometres per hour, burying the town of Armero in Tolima within hours. Three-quarters of Armero's 28,700 inhabitants perished, making the Armero tragedy the deadliest lahar in recorded history and Colombia's worst natural disaster.
Did you know?
- By volcanic standards the eruption itself was small — its devastating power came almost entirely from the lahars it triggered, not from the eruption's explosive force.
- The lahar raced more than 60 kilometres in just two to three hours, reaching Armero in the Azufrado river channel.
- Omayra Sánchez, a 13-year-old girl trapped in the mud for nearly three days, became a global symbol of the disaster after footage of her final hours was broadcast worldwide.
- Two explosions on the northeastern side melted the ice and snow cap, creating the catastrophic mudflows.
- Volcanologists had mapped the lahar hazard and warned of exactly this danger weeks before the eruption — a delayed evacuation that made Armero a textbook case study in disaster-response failure.
Frequently asked questions
How far can you see from Nevado del Ruiz?
On a clear day the terrain allows a line of sight of up to 425 km from Nevado del Ruiz. The average visible distance across all 360 directions is 183 km. Atmospheric conditions (haze, humidity) usually reduce practical visibility below the terrain-limited maximum.
What is the farthest point visible from Nevado del Ruiz?
The farthest terrain visible from Nevado del Ruiz lies 425 km to the north-northeast, at an elevation of 1,831 m. Earth's curvature and atmospheric refraction are accounted for in this calculation.
How high is Nevado del Ruiz?
The observation point at Nevado del Ruiz sits at 5,296 m above sea level (Copernicus GLO-30 elevation model).
How is this visibility map calculated?
UpToWhere traces lines of sight in 360 directions from the observer using 30 m-resolution Copernicus terrain data, correcting for Earth curvature and standard atmospheric refraction. You can run the same analysis for any point on Earth with the free calculator.
Run your own analysis
Want to know what you can see from your house, a summit you're planning to climb, or a plot of land? UpToWhere computes the same 360° viewshed for any point on Earth in seconds — free.
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