Best mountain passes around Froges are found in a region of southeastern France, situated within the Isère department. This area serves as a gateway to diverse terrain in the Belledonne Massif and the Chartreuse Regional Natural Park. The landscape features rugged peaks, limestone cliffs, high-altitude lakes, and forests. Mountaineering routes here traverse notable passes and alpine features.
Last updated: April 28, 2026
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Exceptional site at the foot of the Dent de Crolle with access via a wild forest road
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Climb to the Col du Barioz via Les Fontaines and Le Charpieux. A technical climb after Les Perrins requires vigilance and some pushing. Please note: Passage after Les Perrins may be blocked during the summer by an electric sheep fence.
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Beautiful rock formation. Here is one of the steepest sections
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Perched at 1,434 meters, the Col du Coq is accessible after a twelve-kilometer climb regardless of the direction of the road taken. It offers a beautiful view of the Dent de Crolles.
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Warning! the dogs are poorly trained, so stay calm and wait for the sheep to reorganize.
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Nice alternative to the Trou du Glaz to climb the Dent de Crolles, very aesthetic but which seems to me contraindicated for children or people who do not feel comfortable in the mountains: several places where you have to put your hands despite several handrails and the rock is weathered... I recommend going up (although the climb via the Trou du Glaz can also be a little difficult).
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Col du Barrioz is a climb in the Grenoble region. It has a length of 13.6 kilometers and a climb of 818 vertical meters with a slope of 6% on average, which implies a difficulty level of 614. The top of the climb is located at 1052 m. From this Col you can go up to the Crêt du Poulet refuge
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The region around Froges, particularly within the Belledonne Massif and Chartreuse Regional Natural Park, offers several significant mountain passes. Beyond the popular ones mentioned in the introduction, you can explore Col du Barrioz, located in the Belledonne region, which is the highest of the Balcons de Belledonne passes at 1038 meters. Another notable feature is the Pas de l'Œil, which provides access to the top of the Dent de Crolles, part of a unique and challenging hike.
The area around Froges is a fantastic hub for various outdoor activities. You can find numerous options for hiking, including routes like the Col du Lautaret loop or the Col des Mouilles loop. For cyclists, there are challenging road cycling routes such as the Gorges du Guiers Mort – Col de Porte loop. Additionally, gravel biking is popular, with routes like the Marcieu Pass loop.
Yes, the region is known for its challenging mountaineering routes. For instance, the 'Le pas de l'œil – Dent de Crolles loop' near Saint-Pancrasse is a popular and demanding route, typically taking over 4 hours to complete. Another difficult option is the 'Lacs du Vénétier – Cime de la Jasse loop', which is approximately 17.2 kilometers long and involves significant ascents to high mountain lakes and peaks.
Many passes in the area boast stunning vistas. Bellefont Pass, situated at over 1,900 meters above sea level, offers breathtaking views of Mont Blanc and the highest peaks of the Chartreuse massif. Col du Coq is another excellent choice, providing magnificent views of the Dent de Crolles.
The landscape around Froges is rich in natural beauty. You'll encounter rugged peaks, dramatic limestone cliffs, picturesque high-altitude lakes, and deep forests. The passes often serve as gateways to these features, allowing you to experience diverse alpine environments.
Visitors highly appreciate the stunning scenery, the challenging yet rewarding hikes, and the access these passes provide to significant natural features within the Belledonne Massif and Chartreuse Regional Natural Park. The komoot community has contributed over 190 upvotes and 50 photos, highlighting the region's appeal for mountain sports and exploration.
While specific parking details vary by trailhead, many popular starting points for mountain pass routes, such as the 'Lacs du Vénétier – Cime de la Jasse loop' from Parking de l'Olagneraie, typically offer designated parking areas. It's advisable to check specific route information for precise parking locations before your visit.
While many routes in the region are challenging, there are also options suitable for varying skill levels. For instance, the 'Lac du Pas de la Coche – Grand lac du Vénétier loop' is an intermediate trail that guides hikers through alpine landscapes and past mountain lakes, which might be more accessible than the most difficult ascents. Always check the difficulty rating of a specific route to ensure it matches your group's capabilities.
The best time to visit the mountain passes around Froges for hiking and mountaineering is generally during the late spring, summer, and early autumn months (May to October). During this period, the weather is typically more stable, and the trails are free of snow, making for safer and more enjoyable conditions. Always check local weather forecasts before heading out, especially for higher altitude passes.
Yes, the natural parks and mountainous terrain around Froges are home to diverse wildlife. Depending on the season and your luck, you might spot various bird species, marmots, chamois, or ibex in the higher alpine areas. Observing wildlife requires patience and quiet movement.
For cyclists, especially those tackling passes like Col du Coq, be aware that some roads can be in poor condition with rough sections. The ascent from the north/west to Col du Coq, for example, has challenging parts. Always check road conditions, especially if you're on a road bike, and be prepared for steep gradients and potentially unlit tunnels on descents.


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