I can cover kingdoms but not be touched or seen; Rulers judge me yet lovers endure me. What am I?

A mountain's peak, or leader's conference meeting. Where those can seek, an accomplishment, not fleeting.

I am a place that carnivores love, Though eat at me too often and the oil might send you above. A depression was afoot when a colonel got an idea for me, And later created my first branch in Utah though he started in Kentucky

If you look inside me very deep, You might find climbers frozen in their sleep. Or maybe you will look and find an ass, But on the surface, see naught but a crack.

Once a mighty king among celestial kin, now a shadow in the dwarf's attire. Spins a tale of icy heart, with a name shared by a mythical underworld's sire.