- Col de l'Iseran Sourced
- 2,764 m
- Stelvio Sourced
- 2,757 m
- Beartooth Pass Sourced
- 3,337 m
- Lapse rate ISA
- 6.5 °C/km
Why passes carry consequences
A pass road concentrates every variable a touring rider manages. Temperature falls by roughly 6.5 °C for every 1,000 m of climb in the International Standard Atmosphere, so a warm valley morning can become near-freezing on top. Hairpins slow you to walking pace, then ask for precise throttle on gradients that unsettle a loaded bike. Fuel is usually in the valleys, not on the climb. And the season is short: snow decides when most high roads open and close, not the calendar.
None of that is a reason to avoid them. It is a reason to ride them in the right order: climb in the morning, cross the summit before convective cloud builds, descend with energy left, and know which lower road you take if the top is closed or clagged in.
Route briefings
- Alpine paved
- Toll road
- Seasonal



