Signal des Voirons from Saint-Cergues: A Quiet Forest-Road Climb Above Geneva

Signal des Voirons from Saint-Cergues is 12.7 km (7.9 mi) long with 872 m (2861 ft) of climbing at a 6.9% average, from 550 m (1804 ft) to 1418 m (4652 ft).

The climb comes in three parts. The paved opening is the hardest: the first four kilometers average about 8.2%, with kilometer 4 at 9.5% through the hairpins. The grade eases over kilometer 5 and almost flattens at 2.3% for kilometer 6, around where the pavement gives way to gravel.

The gravel middle section climbs more gently - kilometers 7 to 10 average about 6.2%, easing to 4.0% for kilometer 10. Once you rejoin the paved road the grade kicks back up, with the final 2.7 km averaging about 8.2% and kilometer 12 at 9.0%.

Steepest sections: 9.7% for the steepest kilometer, 9.3% for the steepest 2 km and 7.6% for the steepest 5 km. The steepest mile (1.6 km) averages 9.5%. The climb is currently ranked #1247 in the world in our database.

Provisions: Stock up before you leave Saint-Cergues - there is nothing on the climb itself and no cafe at the top, so carry all the water and food you need. The Monastère Notre-Dame des Voirons near the top has a craft shop, but it isn't a place to refuel.

Gear: Tire choice matters more than gearing here: tires of 35 mm or wider with some tread make the gravel section and the descent far more comfortable. The paved hairpins at the start reach 9-10%, so pair them with a compact crankset and a wide-range cassette. The forest stays cool even in summer and the ridge is often breezy, so bring a layer.

The Voirons have drawn pilgrims for centuries. Louis de Langin founded the first chapel here in the 15th century to house a black Virgin, and Saint François de Sales came in 1595; after a fire, the statue was moved to the church in Boëge, where it remains. Since 1967 the top of the massif has been home to the Sisters of Bethlehem, whose Monastère Notre-Dame des Voirons (about 100 nuns) has a chapel, art studios and a craft shop open to visitors on weekday afternoons - check the hours before you go.

From the car park, the GR Balcon du Léman follows the wooded ridge to the Signal des Voirons at 1480 m (4856 ft), with a 360-degree panorama over Geneva, the Jura and the Mont Blanc chain. About 10 minutes beyond the Signal is the Saut de la Pucelle, a cliff-edge overhang, and the ridge path continues past the Col du Pralère toward the Notre-Dame du Pralère oratory on a lookout.

Back in Saint-Cergues, the Cave aux Fées hiking trail starts by a dolmen and climbs along the Chandouze torrent to the same ridge - a good way to see the mountain on foot on a rest day.