Dip and the squashed Sun
From a 4,696 ft summit the level horizon is not where you see it. That much drop gives a geometric dip of 1.21 degrees; air bending light downward pulls the visible horizon to about 1.12 degrees. That is a little over two Sun-diameters of sky you see before anyone at sea level does.
So sunrise up here arrives several minutes early. And the disc comes up flattened, an orange oval, because refraction lifts the lower limb more than the upper. It rounds out as it climbs.
The last light at the horizon is green. Low air bends the Sun and strips the reds and violets away, leaving a green rim that can flash for a second or two on a clean, distant horizon. A high, unobstructed perch is what gives you the window.
Numbers from the standard refraction model, checked against the raw geometry.
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