Col de la Bonette

Col de la Bonette is a high mountain pass in the French Alps, situated within the Mercantour National Park in the department of Alpes-Maritimes. It connects the Ubaye Valley to the north with the Tinée Valley to the south, forming a vital link in the region's alpine road network. Renowned for its extreme altitude and the scenic loop road over the nearby summit, it is a major destination for motorists, motorcyclists, and cyclists seeking high-altitude challenges.

Geography and location

The pass is located on the border between the Cottian Alps and the Maritime Alps, near the summit of the Cime de la Bonette. It lies within the administrative region of Provence-Alpes-Côte d'Azur, specifically in the Arrondissement of Nice. The surrounding terrain is characterized by rugged peaks, alpine meadows, and glacial cirques, typical of the southern Alps. Key nearby summits include Mont Mounier and Aiguille de Chambeyron, with the pass itself providing a watershed between the Mediterranean Sea and the Rhône River basin. The area falls under the protection of the Mercantour National Park, which conserves its diverse flora and fauna.

History

The strategic importance of the route dates to the 19th century, with initial construction beginning under the direction of the French Army to improve military mobility following the Treaty of Turin (1860). The road was engineered to facilitate troop movements and strengthen border defenses near the frontier with the Kingdom of Sardinia. It saw significant use during military exercises and later became part of the Route des Grandes Alpes, a tourist itinerary conceived in the early 20th century. The modern asphalt road was completed in 1960, coinciding with increased alpine tourism. Historically, the area was also traversed by transhumance herders moving livestock between seasonal pastures.

Road characteristics

The pass is traversed by departmental routes D64 and D68, which are narrow, winding, and feature numerous hairpin turns. A unique feature is the optional "loop road" that ascends beyond the pass to the summit of the Cime de la Bonette, reaching 2802 meters, which is often incorrectly cited as the highest paved through-road in Europe. The road is typically closed by snow from late October to early June, with maintenance managed by the Direction Départementale des Territoires et de la Mer. Its engineering includes retaining walls and avalanche galleries to mitigate hazards from rockfall and severe weather common in the Alps.

Tourism and cycling

Col de la Bonette is a celebrated climb in professional road bicycle racing, having been featured multiple times in the Tour de France since its first inclusion in the 1962 Tour de France. It is often categorized as an Hors catégorie climb due to its length and gradient, challenging riders like Marco Pantani and Chris Froome. The pass is a highlight of the Route des Grandes Alpes and a magnet for motorcycle touring enthusiasts. Summer tourism focuses on hiking within the Mercantour National Park, photography, and alpine driving events. The nearby villages of Jausiers and Saint-Étienne-de-Tinée serve as traditional starting points for the ascent.

In popular culture

The dramatic landscape of the pass has been used as a filming location for several French and international productions, capitalizing on its rugged, remote scenery. It is frequently featured in automotive and adventure television series, such as those produced by the BBC's *Top Gear*, which have highlighted its driving challenges. The pass also appears in numerous documentaries about the Tour de France and alpine engineering, as well as in photography books dedicated to the French Alps. Its iconic status is reinforced through regular coverage in magazines like National Geographic and specialized cycling publications.

Category:Cols of the Alps Category:Mountains of Alpes-Maritimes Category:Tour de France climbs