Col du Pradier: Driving the Mixed-Surface Route des Alpages
Located in the Savoie department of southeastern France, Col du Pradier is a high mountain pass at an elevation of 1,450m (4,757ft) above sea level. The climb follows the Route des Alpages, a technical track that transitions from asphalt to a rough mountain path as it gains altitude in the Rhône-Alpes region.
| Road facts: Col du Pradier | |
|---|---|
| Location | Savoie, France |
| Elevation | 1,450 m (4,757 ft) |
| Length | 4.0 km (2.5 miles) |
| Avg Gradient | 7.7% |
| Surface | Paved & Gravel |
How is the drive to Col du Pradier?
The ascent to the pass starts near Saint-Marcel, leaving the paved D85 road. The total climb is 4.0 km (2.5 miles) long with an elevation gain of 308 meters. While the first part of the Route des Alpages is asphalted, it is extremely narrow and winding. The average gradient is 7.7%, but the difficulty increases significantly in the final stretch. Expect tight corners where visibility is limited by the mountain slopes and local vegetation.
What is the surface like on the final stretch?
The last 1.4 km to reach Col du Pradier is strictly unpaved. This section features a gravel surface that is more akin to a mule path than a maintained road. It is rocky, uneven, and can be washed out after heavy rains. High ground clearance is necessary for this final part to avoid underbody damage. Because it is a high-altitude pasture road (Route des Alpages), you should also be alert for livestock and agricultural vehicles that have priority on these tracks.
Driving risks and seasonal access
The primary hazards are the lack of passing space and the loose surface on the final 1.4 km. There are no safety barriers, and the drops on the side of the track are steep. In winter, the road is typically blocked by snow and is not maintained for public transit. Even in late spring, the gravel section can be very muddy due to snowmelt. Drivers should use low gears during the descent to manage the 7.7% grade without overheating the brakes on such a narrow and technical path.
Logistics and Technical Prep
Before leaving the D85, check your tires for sufficient tread. The sharp gravel on the upper section of the Col du Pradier can easily cause punctures in standard road tires. There are no services or fuel along the 4 km climb. Ensure your vehicle's cooling system is functioning correctly, as the slow-speed climb in low gears puts a constant load on the engine. Due to the narrowness of the Route des Alpages, this road is not suitable for large campers or trailers.