Mountain passes around Hostun are situated in the Drôme department of France, within the Vercors massif. This region is characterized by its limestone escarpments and deep valleys. The area offers routes that traverse dramatic natural formations. It is known for its scenic roads and elevated viewpoints.
Last updated: April 28, 2026
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Here is the route for the ascent of the Col de la Machine starting from Saint-Jean-en-Royans, which passes through the incredible Combe Laval!
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After a long section of "classic" pass, we suddenly find ourselves on the side of a cliff with a majestic view 😍. The valley is not very long but magnificent. Many nooks and crannies to stop and take a photo.
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A fairly demanding pass at first, but it eventually eases off as the scenery becomes incredible! 6 km at 8%, then 6%, 4%, 5% (not sure, I was just looking at the scenery) and the last two km at 4%.
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The landscape is an absolute eye-catcher, a great road with countless views.
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Magnificent landscape, great road in the rocks. More information: https://www.quaeldich.de/touren/touren-im-parc-naturel-regional-du-vercors/route-combe-laval-variante-1/
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Small pass on the D199, unfortunately without a pass sign. There is a small water source not far away.
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Fantastic landscape, beautiful road. Combe Laval, a must in the Vercors.
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The Col de la Machine is located at the end of the remote karst of Combe Laval. The panorama is spectacular and the site gives you an overall impression of the natural environment which constitutes the Vercors massif.
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The mountain passes around Hostun are characterized by their dramatic natural formations, including limestone escarpments and deep valleys within the Vercors massif. They offer scenic roads, elevated viewpoints, and routes carved directly into rock faces, such as the famous Combe Laval Cirque.
The Machine Pass offers spectacular panoramas of the Vercors massif. Another must-see is the Ascent to the Col de la Machine, known for its breathtaking balcony road under limestone overhangs and tunnels. The Combe Laval Cirque also provides exceptional views from its road carved into the rock.
Yes, routes like the Ascent to the Col de la Machine are considered challenging, featuring significant elevation gain and steep sections. The Combe Laval Cirque is also very popular with cyclists for its demanding yet rewarding terrain and views.
From passes like Machine Pass, you can expect spectacular panoramas that give an overall impression of the Vercors massif's natural environment. The Ascent to the Col de la Machine offers breathtaking views from its balcony road, while the Combe Laval Cirque provides splendid views of the Royan landscape from its dizzying viewpoints.
The Col de la Portette, culminating at 1,173 meters in the middle of the Vercors massif near Bouvante, offers a quieter experience. It's a smaller pass, often without a pass sign, and features a small water source nearby.
The region around Hostun offers a variety of outdoor activities. You can find numerous hiking trails, including challenging routes like the 'Tour of the Monts du Matin' or moderate options like 'Le Pas du Loup – Viewpoint of the Vercors loop'. There are also running trails and gravel biking routes, such as the 'Cirque of Combe Laval – Machine Pass loop'. For more details on routes, visit the Hiking around Hostun, Running Trails around Hostun, and Gravel biking around Hostun guides.
While some mountain passes involve challenging terrain, there are family-friendly hiking options in the broader Hostun area. For instance, the 'Thaïs Cave – View of the Vercors Valley loop' is a moderate hike. When planning, look for trails with lower difficulty ratings in the Hiking around Hostun guide.
Visitors frequently praise the breathtaking landscapes and spectacular panoramas. The unique experience of driving or cycling on roads carved into rock, like the Combe Laval Cirque, with its continuous alternation between tunnels and open-air sections, is a major highlight. The challenging yet rewarding climbs and the stunning views of the Vercors massif are also highly appreciated.
Yes, the Pas de Bouvaret (1,132 m) is an intermediate mountain pass that allows you to traverse from one side of Musan to the other. It's known for being less steep than the Pas de la Pierre and offers a viewpoint accessible via a small path in the woods, making it a worthwhile stop for scenic views.
The Vercors massif, where Hostun is located, is best visited during the warmer months, typically from late spring to early autumn (May to October), when the roads are clear of snow and ice, and weather conditions are most favorable for outdoor activities like cycling and hiking. Winter conditions can make some passes inaccessible or require specialized equipment.
Some routes, particularly the balcony roads like the Ascent to the Col de la Machine, are not recommended if you suffer from vertigo due to their exposed nature and dizzying views. Always check local conditions, especially during adverse weather, and ensure your vehicle or bicycle is in good condition for mountain terrain. For hiking, wear appropriate footwear and clothing.


See even more epic mountain passes by checking out these guides around Hostun: