Sa Calobra (Coll dels Reis)
Mallorca's most famous and arguably toughest climb: a dead-end road that drops to the sea at Port de Sa Calobra, so the only way out is back up. About 9.5 km at an average ~7%, it winds through 14 hairpins and the spectacular 270-degree 'Nus de Sa Corbata' knot. The Strava segment is among the most-attempted climbs in the world, with a pro-level KOM.
