I've seen similar occasionally in the mountains before, but not as intense as this.
These pictures are straight off an iPhone with no retouching; this is not lens flare - and the pictures don't really do it justice.
Anyone else get some good pictures of this, or see it at another ski area?
I think this page describes the phenomenon;
https://cloudatlas.wmo.int/en/differentiation-characteristics-of-the-46-degree-halo-and-Supralateral-arc.html