Mikaela Shiffrin Thanks Mammoth For "Best Training In The World" Summer Session

We reported earlier this week that all-time ski racing great Mikaela Shiffrin was spotted training at still-open Mammoth Mountain, California.A few lucky fans whipped out their phones and captured Shiffrin as she sliced and diced her way through a heavily salted slalom course. Click here for more.Shiffrin's summer training session at Mammoth is over, and she took to Instagram to thank the mountain for hosting her. She also shared some absolutely stellar shots by photographer Mike Dawsy. Check th