challenging-routes-box-11 Furka pass Realp Oberwald – Furka Pass Goms Oberwald – Fiesch Gotthard downhill Gotthard pass – Andermatt Nufenen downhill Airolo Nufenen pass – Airolo Nufenen Pass Ulrichen Ulrichen – Nufenen Pass Schwarzwald (Germany) Tremola Airolo Airolo – Tremolo