Looking at the map, it looks like the pass would cover to or near Visp. Trying to decide if we should get 4 or six day passes. Will spend 4 nights in Mürren and will be traveling from Lucerne and leaving to Visp.
The BO Pass will fully cover all the way to Brig, but you must use the regional train passing through Frutigen and Kandersteg, not the fast train that goes through the tunnel straight to Visp.
https://www.berneseoberlandpass.ch/assets/Uploads/Geltungsbereich-Berner-Oberland-Pass-2024.pdf
Thank you so much!