Checked viewpoint
Flattop Mountain
Chugach, Anchorage, south-east · 231.5 kmVisible · Denali 1,305 m above the modelled horizon
Smallest clearance along the line: 115 m
Still visible without refraction and 100 m away in each direction.
Where can you see
Where can you see Denali?
Explore theoretical visibility around Denali in Alaska, across the high ridges and valleys of the Alaska Range. Beyond the map, a viewpoint 232 km away with a modelled view of Denali is checked below.
Calculated radius: 100 kmTheoretical visibility; actual views and access are not guaranteed.
Check your viewpoint
Can you see Denali from where you are?
Choose an observation point to estimate visibility using the terrain model.
Terrain and viewing conditions
Denali rises in the Alaska Range. Its high summit does not make every surrounding valley an open viewpoint: intervening mountains can raise the terrain horizon. Compare directions within the map and check the terrain profile for a precise observation point.
The map covers only the area within 100 km of the summit. The linked Anchorage example is a separate, more distant sight line; its result cannot be extended to all of Anchorage or to every point in between.
Beyond the map
Distant viewpoints checked one by one
The map stops at 100 km. This viewpoint, 232 km away, was 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.
Open the calculation
Example lines of sight
How do distance and terrain affect the view?
Open a reproducible Sightelo analysis with its terrain profile.
Line of sight
Denali from Anchorage
Anchorage, United States → DenaliView analysisComplementary, independent analysis outside this map’s 100 km radius.
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
Have another mountain in mind?