How to drive the unpaved road to Schwarzsee at the foot of the Matterhorn?
Schwarzsee is a high mountain lake at an elevation of 2,588m (8,490ft) above sea level, located in the Canton of Valais, Switzerland. Sitting right at the base of the iconic Matterhorn, the road to the "Black Lake" is a brutal unpaved climb that ranks among the highest roads in Switzerland.
| Road facts: Schwarzsee | |
|---|---|
| Location | Valais, Switzerland |
| Elevation | 2,588 m (8,490 ft) |
| Length from Biel | 4.5 km (2.8 miles) |
| Average Gradient | 9.08% |
| Surface | Unpaved / Dirt and Gravel |
Where is the road to Schwarzsee?
The track starts in Biel and winds its way up towards the Theodul glacier area. This is a high-altitude environment where the weather can turn in minutes. Logistically, the road is an essential link for the mountain huts and the chapel of "Maria zum Schnee," but for a driver, it’s a constant battle with the steep terrain and narrow passing points. The route is close to the famous Theodul Pass, a historic crossing where fog often rolls in, making the track's edge vanish from sight.
Is the road to Schwarzsee unpaved?
Yes, the 4.5 km climb is entirely unpaved and demands a high-clearance 4x4. The surface is a mix of dirt and Alpine gravel that becomes a slippery mud trap when it rains. Technically, the 9.08% average gradient is deceptive; there are ramps where the incline is much sharper, forcing you to maintain a steady torque to avoid spinning your tires on the loose stones. If you’re scared of heights, this road will test you—the drop-offs are steep, and there are almost no barriers to protect the undercarriage or the vehicle from the slopes.
How long is the drive to Schwarzsee?
Starting from Biel, the 4.5 km transit involves a massive 409-meter elevation gain. It’s a slow, technical grind where you have to watch out for deep ruts and water run-offs that can catch your wheels. As one of the highest mountain roads in Switzerland, the thin air at 2,588m means your engine will lose power, so gear management is key to preventing overheating during the ascent. You’ll need to take it slow, especially on the tighter bends where the road is barely wide enough for a single vehicle.
Is the road to Schwarzsee open in winter?
No, the road is completely impassable during the winter months. At this altitude, snow stays on the ground for more than half the year, often blocking the track well into late spring. Even in early summer, you can find meltwater making the road muddy and soft, which can lead to your tires getting bogged down if you don't have proper off-road equipment. Before you head up, make sure the track has dried out, or you'll find yourself sliding on the steep, black dirt that gives the lake its name.