I wonder if the Sun might have been hidden behind Devil's Head, and
what you saw was a circle of light reflected from aligned ice crystals
above the mountain. The ice might have condensed from water vapor
in the air because of the passage of whatever made the streak, or
it might have been there by coincidence.

Here's a simple diagram of a fairly common type of halo made by the
Moon or the Sun, showing the relative size of the ring in comparison
to the size of the Moon or Sun, which I made for a similar question
in 2005:

http://www.freemars.org/jeff2/halo1.png

-- Jeff, in Richfield, MN

__________________
http://www.FreeMars.org/jeff/

"I find astronomy very interesting, but I wouldn't if I thought we
were just going to sit here and look." -- "Van Rijn"

"The other planets? Well, they just happen to be there, but the
point of rockets is to explore them!" -- Kai Yeves