I ran Trail des 6 Cols (42K / 3500M+ ) one month ago, and it was amazing. Less Technical than Glen Coe, I think but relatively with high altitude parts (highest point of the race ~3500 mt) and beautiful sights.
You can find more info here : https://www.high-trail-vanoise.com/en/races/
a,nd a beautiful vidéo of the 2018 edition : https://www.youtube.com/watch?v=M7RzEq2guKQ
I ran another local race in Italy, more techincal, but low altitude, with 42K and 3000M+ :