Alpe d'Huez and Col de Sarenne Loop

This route is considered difficult and requires a very good fitness level. While the average gradient from Alpe d'Huez to Col de Sarenne is 4.2%, it includes deceptive descents and false flats before a challenging final 1.6 km climb at 10.5%, followed by 450 meters at 6% to the summit. The road surface can also add to the technical difficulty.

The road surface on the Col de Sarenne is often described as 'patchwork' and 'sketchy in places,' particularly on the descent. Some sections might be unpaved and difficult to ride. There are also narrow sections and tunnels, especially on the Auris balcony road, where bike lights are recommended.

The route offers breathtaking scenery, including views of the Romanche Valley from the vertiginous Auris balcony road. You'll also pass the Lac du Chambon and its dam, and enjoy remote, peaceful sections with babbling brooks, rocks, and sheep, offering stunning natural environments.

The best time to cycle this route is typically during the warmer months, from late spring to early autumn, when the mountain passes are clear of snow and the weather is most stable. Always check local conditions and forecasts before you go.

Parking is generally available in Alpe d'Huez or Bourg d'Oisans, which are common starting points for rides in the area. Specific parking lots can be found within these towns, offering convenient access to the route.

No specific permits or entrance fees are required to cycle this route. While parts of the area are within the vicinity of Écrins National Park, cycling on public roads like the Col de Sarenne does not typically incur fees. However, always respect park regulations regarding nature and wildlife.

This is a road cycling route, so while dogs are generally allowed in the region, bringing a dog along for the ride itself would depend on your specific setup (e.g., a bike trailer). Always ensure your dog's safety and comfort, and be mindful of local regulations, especially concerning livestock like sheep you might encounter.

This route is approximately 54 kilometers (33.6 miles) long with over 2,100 meters (6,900 feet) of elevation gain. It typically takes around 5 hours and 42 minutes of moving time to complete, but this can vary significantly based on your fitness level and how often you stop to enjoy the views.

This route offers a 'hidden gem' experience, providing a quieter, more wild 'back route' to Alpe d'Huez. It's often considered more spectacular and interesting than the main climb, with stunning natural environments and fewer crowds. It also allows for an excellent loop ride, incorporating the iconic Alpe d'Huez with the scenic Sarenne and Auris balcony roads, and was famously included in the Tour de France in 2013.

Yes, this route intersects with several other notable cycling paths. You'll find sections that are part of the 'Route des Grandes Alpes à vélo, variante L'Alpe d'Huez / Briançon' and the 'Tour de l'Oisans et Écrins'. It also briefly touches upon the 'Tour du Parc National des Écrins'.

While the route itself passes through some remote sections, you'll find cafes and restaurants in the towns at either end or nearby, such as Alpe d'Huez and Bourg d'Oisans. It's always wise to carry sufficient water and snacks, especially for the more isolated parts of the Col de Sarenne.

Given the challenging nature and varied road conditions, bring a well-maintained road bike suitable for climbing, plenty of water and nutrition, and appropriate cycling gear. Due to potential narrow sections and tunnels, especially on the Auris balcony road, bike lights are highly recommended. Always carry repair essentials and be prepared for changing mountain weather.