eWTF is a mountain rating?e
e
To my knowledge there is no such thing, however a friend of mine with many thousand of hours of jet time told me she attended a "Mountain Flying Camp"
https://www.mountaincanyonflying.com
No endorsement to be had but she said it was fun, I think they just drill into you being real particular about knowing your planes exact weight and where the stall is for each weight bracket, kit out the planes you fly with lift reserve indicators etc and warn you about mountain waves, lenticular clouds and flying up box canyons, density altitude etc.
Looks like a nice place to visit and fun thing to do, but I understand they charge like a wounded buffalo