In rec.photo.film+labs Chris Sprague wrote:

Velvia 50 @ EI 40:
http://www.umit.maine.edu/~christoph...hdin_RVP50.jpg

Velvia 100 as rated:
http://www.umit.maine.edu/~christoph...din_RVP100.jpg

Thanks for the comparison. You are right that Velvia 100 is more
magenta; maybe also a bit redder. After increasing green gamma 1.08
and decreasing red gamma .98, the mountain, forest, and lake are
almost a perfect match. (In Photoshop etc. this could be done by
increasing brightness then changing color balance.) But note that
the cirrus clouds are whit with Velvia 100. Despite its green bias,
Velvia 50 didn't produce pure whites.

Did you have to hike to this spot? I once climbed Mount Katahdin
in winter, and we had to ski many miles to a cabin near the base
where we stayed overnight. That cabin must be closer to the mountain
than the spot where you took this picture.