Merriam-Webster defines alpenglow as
a reddish glow seen near sunset or sunrise on the summits of mountains
The Rise of Endymion, p. 317:
I folded my arms and looked out at the alpenglow illuminating the cloudtops many kilometers below and the brilliant evening light on the northern peak.
Bonus usage, p. 354
I confess that I am disappointed: we had planned to arrive at Potala in the twilight, while there was still alpenglow lighting the north-south ridges and the higher peaks to the north and west of the palace.
See also: Belt of Venus, a form of alpenglow, the name of which alludes to the girdle or breast-band of Romanized Aphrodite mentioned by Homer in Iliad book 14:
"Take this girdle, keep it in your breast.
Here are all suavities and charms of love.
I do not think you will be ineffective
in what you plan."
A similar scene plays out in Dan Simmons's Olympos, p. 49:
“On this band are all the beguilements of seduction,” Aphrodite said softly. “The heat of Love, the pulsing rush of Longing, the sibilant slidings of sex, the urgent lover’s cries, and the whispers of endearment.”