Route départementale 42, road in Savoie, France
Route Départementale 42 is a mountain road in Savoie connecting Le Bourget-du-Lac with Meyrieux-Trouet and Saint-Paul, spanning about 22 kilometers (13.7 miles). The road follows the slopes of Mont du Chat with tight curves and offers viewpoints overlooking the lake and surrounding landscape.
The road was built in the 1960s to connect transmission stations on Mont du Chat and link different regions of Savoie. It later gained fame when Tour de France cyclists passed through twice, making it known as one of France's toughest climbs despite its short distance.
The road links small communities and shows visitors how locals move through their landscape. Drivers often pause at rest areas along the way to enjoy local food or simply observe the countryside rhythm.
The road is best driven during warmer months as winter snow often closes it temporarily. Drive slowly through the many curves and use the parking areas at viewpoints to safely enjoy the views without rushing.
Paragliders use a takeoff area at the Mont du Chat summit to launch from strong mountain winds. This activity is possible because the elevation and exposed location create ideal conditions for free flight.
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