Checked viewpoint
Mount McLoughlin
Southern Oregon, north · 115.5 kmVisible · Mount Shasta 850 m above the modelled horizon
Smallest clearance along the line: 134 m
Still visible without refraction and 100 m away in each direction.
Where can you see
Where can you see Mount Shasta?
Explore theoretical visibility around Mount Shasta in northern California, between volcanic slopes, valleys and neighbouring mountains. Beyond the map, viewpoints 116 to 162 km away with a modelled view of Mount Shasta are checked below.
Calculated radius: 100 kmTheoretical visibility; actual views and access are not guaranteed.
Check your viewpoint
Can you see Mount Shasta from where you are?
Choose an observation point to estimate visibility using the terrain model.
Terrain and viewing conditions
Mount Shasta is a large volcano in northern California, in the Cascade Range. Its volcanic slopes and the surrounding mountains make observer position essential: compare valley floors, slopes and ridgelines using the map, then calculate an exact sight line.
A geometrically open direction does not guarantee a clear view. Cloud, haze and imperfectly represented local obstructions remain outside a reliable prediction of an actual observation.
Beyond the map
Distant viewpoints checked one by one
The map stops at 100 km. The viewpoints below, 116 to 162 km away, were each calculated with this map’s summit target and the standard example settings: Copernicus terrain, Earth curvature and standard refraction (k = 0.13). This is theoretical visibility: weather, haze and nearby trees or buildings are not modelled.
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Checked viewpoint
South Yolla Bolly
Yolla Bolly, California, south-west · 162.4 kmVisible · Mount Shasta 505 m above the modelled horizon
Smallest clearance along the line: 90 m
Still visible without refraction and 100 m away in each direction.
Understand the map
Why isn't visibility a simple circle?
Terrain
Mountains and ridges can block the line of sight.
Earth's curvature
At long distances, Earth's curvature becomes significant.
Elevation
A higher observation point can dramatically increase visibility.
How was this visibility map calculated?
Sightelo samples observation points within 100 km of the summit, using surface elevations, Earth curvature and standard atmospheric refraction. This is a calculation assumption, not a prediction of real atmospheric conditions.
Copernicus DEM is a surface model: buildings and vegetation may influence its elevations, but Sightelo does not model them individually. Local obstructions remain imperfectly represented. Weather, clouds, haze and aerosols are not predicted.
- Terrain data
- Copernicus DEM 90, with DEM 30 refinement when data are available and the refinement criteria are met. The local threshold is at most one third of the sight-line elevation change, capped at 30 m for DEM 90 and 10 m for DEM 30.
- Earth curvature
- Included
- Atmospheric refraction
- k = 0.13
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