It is a long way from down the Valais/Wallis valley in Switzerland from Turtmann (627m) via Eischoll (1238m) (1222m and 100m shorter, if you go through the village) and down to 1151m and then through Bürchen to the pass (I am not totally sure that the way I show on the map through Bürchen is possible and I probably took the bigger road myself here).

One could also climb directly up from Visp (653m) and above Bürchen on a more consistently steep climb. Through Bürchen it is really steep for some time with up to 16-17%, but then it becomes a little easier again up in the woods. There is also an alternative road to climb from Visp via Zeneggen (1367m), where you pass by another small pass (Loch (1523m)). The eastern side from Stalden (867m) is more evenly steep, with serpentines all the way up. Here you can choose the slightly shorter road using the tunnel half-way up or take the longer main road.