GR R2 — La Grande Traversée
Selvaggio Blu
GR R2 — La Grande Traversée vs Selvaggio Blu: Intensity Score Comparison
Both routes share a similar overall intensity (76 vs 77). Depending on personal strengths, the challenge relies more on GR R2 — La Grande Traversée's technicality versus the physical output of the other.
Model-based (not a field report) · Evaluates overall route demand, not danger.
The GR R2 is a legendary long-distance trail that traverses the French island of Réunion in the Indian Ocean from north to south. It is widely considered one of the most physically demanding GR trails in the French network due to its extreme verticality and tropical environment. The route crosses the three massive 'Cirques' (natural amphitheaters), climbs the highest peak in the Indian Ocean (Piton des Neiges, 3070m), and borders the active volcanic zone of Piton de la Fournaise.
The Selvaggio Blu ('Wild Blue') is a multi-day technical expedition within the Golfo di Orosei, Baunei region of Sardinia. It is defined by its vertical coastal topography, utilizing ancient juniper ladders (scale 'e fustes'), non-standard navigation across minimal signage, and often required vertical abseils (rappelling) of up to 45 meters. The circuit threads through the Supramonte coastal strip, remaining isolated from road infrastructure and requiring bivouacking on remote beaches. It represents the most demanding coastal traverse in Italy due to the absence of natural surface water and the complexity of the Mediterranean karst terrain.
Head-to-Head Metric Analysis
HikeMetrics Hazard Scale — Explanation
The HikeMetrics Hazard Scale is a proprietary 5-point classification system that evaluates hiking routes across five dimensions: physical demand, technical complexity, altitude exposure, weather risk, and rescue accessibility.
Unlike generic star ratings, the Hazard Scale is calibrated against altitude profiles, elevation gain per day, and logistical isolation factors — making it the most precise route classification system available.
Full Scale Documentation