Thruhiked across a mountain range
Went backpacking
Hiked through the Pyrenees
+1
I hiked across an entire mountain range. Solo. What?! In July I left for a thruhike of the GR11 trail that runs on the Spanish side of the Pyrenees. I walked from the Cantabrian Sea to the Mediterranean, 848km and over five Everests of elevation change. 

https://rosienvantoor.com/2022/09/13/day-43-the-final-day/