Driving the steep service road to Greppon Blanc in Valais
Greppon Blanc is a high mountain peak at an elevation of 2,635m (8,645ft) above sea level, located in the canton of Valais, Switzerland. Situated above the Veysonnaz and Thyon resorts, the summit is a key point within the famous 4 Vallées ski area.
The peak offers an exceptional 360-degree panorama of the Pennine Alps, including views of the Matterhorn and the Dent Blanche on clear days. The road to the summit is primarily a maintenance track for the ski lift infrastructure. It is a high-altitude alpine environment where the terrain is raw and exposed, characterized by limestone rocks and sparse high-mountain vegetation. Due to its position on a ridge, the area is frequently buffeted by strong winds throughout the year.
| Road facts: Greppon Blanc | |
|---|---|
| Location | Valais, Switzerland |
| Elevation | 2,635m (8,645ft) |
| Starting Point | Thyon |
| Length | 5.3 km (3.29 miles) |
| Elevation Gain | 529 m |
| Average Gradient | 9.98% |
| Max Gradient | 30% |
How challenging is the road to Greppon Blanc?
The ascent to the summit is a formidable challenge for any off-road driver. Starting from Thyon, the road to the summit is 5.3 km (3.29 miles) long. Over this distance, you will tackle an elevation gain of 529 meters. While the average gradient is a steep 9.98%, the most difficult sections feature extreme pitches exceeding 30%. The surface is composed of loose stones and rocky gravel, which becomes increasingly unstable and rugged as you approach the upper station. Traction is the main concern on these steep ramps, making a 4x4 vehicle with low-range gearing absolutely necessary.
What are the driving conditions in Veysonnaz?
The track is a typical chairlift access trail, meaning it is narrow and lacks any form of safety barriers. It is only accessible during the summer months, usually from late June to September, once the snow has been cleared or melted. Even in mid-summer, sudden mountain storms can bring snowy days or freezing fog. Because it is a service road for the Veysonnaz and Thyon ski resorts, drivers must be prepared for steep drop-offs and potential maintenance traffic. This is a route strictly for experienced mountain drivers who are comfortable navigating loose, high-gradient alpine terrain.
Pic: Bram