Sentier du Col de Bertol

This very steep climb rises above Arolla in Valais. Expect 25 to 42 minutes. The hardest 500 metres average 24.2% and start 1.7 km in, so the worst of it lands when you are already committed. Northwest-facing, so it stays cool and holds snow late. At 8.0 TEP it is harder than 72% of the climbs in the catalogue. It is graded demanding mountain hiking: expect sections where you watch every step.