Best natural monuments around Saint-Ismier are found within the Grésivaudan valley and the Chartreuse massif. This region offers diverse natural landscapes, from preserved alluvial forests to high mountain peaks. Saint-Ismier serves as a gateway to several notable natural sites, including sensitive natural areas. The area is characterized by significant ecological value and offers numerous opportunities for outdoor exploration.
Last updated: May 4, 2026
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Highlight • Mountain Pass
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Popular around Saint-Ismier
From this cross there is a splendid view of the Chartreuse massif, the Grésivaudan valley towards Grenoble and Chambéry, the Belledonne massif and, as an added bonus, there are orientation tables. Super 👌!
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Magnificent lake! Accessible to all! As a bonus, you'll find ibexes and a few marmots if you're lucky. For the more courageous, you can climb to an altitude of 2,900 m by continuing on the path with a magnificent view if the sky is clear!
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A stunning summit with views of Mont Blanc. The two climbs from the Col des Ayes are relatively steep, but steel cables are installed at the more dangerous sections. The climb north via the Trou du Glaz is a bit longer and a bit easier. The climb east is a bit steeper and more exposed. The view is good, though.
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Magnificent and relatively easy pass, with basic fitness. Offers a magnificent view of Mont Blanc. Be careful though, the Chaos and the Col are currently completely covered in snow. Being in a group, I did not attempt the ascent of the Col which, without equipment, can be particularly slippery and dangerous. Possibility of going back down via Prayet towards Saint Pierre en Chartreuse. Tested in November, however, no problems observed, very accessible.
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Culminating at 2,062 meters above sea level, the Dent de Crolles is the second peak of Chartreuse. Accessible, it offers a vast panorama of the south of Chartreuse, the Belledonne massif and the Grésivaudan valley.
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Really magnificent view of the malissard, the bellefont and the entire extension of the Chartreuse. The climb is not too hard, you can get water on the south side at the cabin at the foot of the source.
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2nd highest peak in the Chartreuse. Looks impressive from afar with its sheer wall. There are 2 routes to go up there, the Trou du Glaz, and the pas de l'oeil. By the step of the eye from the Col des Ayes it is very steep at the beginning then on the balcony, then we arrive on the technical part with a chain to climb a small steep path. Be careful, this part is quite slippery on the stones and a little exposed in a fault in the cliff. Overall it's going well, you just have to be a little concentrated. The view at the top is amazing. The bivouac without tent is authorized there. Waking up in the early morning with the chamois is exceptional!
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The region around Saint-Ismier offers several popular natural monuments. Visitors frequently enjoy the panoramic views from Dent de Crolles, the second-highest summit of the Chartreuse massif. Another favorite is Charmant Som summit, known for its spectacular panorama and relatively accessible ascent. For stunning valley views, the Revollat Cross is also highly regarded.
Yes, for a family-friendly outing, Lake Crozet is an excellent choice. Perched at 1,974 meters, it offers beautiful views and a relatively accessible route from the Pré Raymond parking lot. Additionally, the Espace naturel sensible du Bois de la Batie in Saint-Ismier itself provides equipped trails suitable for families to explore a preserved alluvial forest and observe local wildlife.
The natural monuments around Saint-Ismier showcase a diverse range of features. You can explore high mountain summits like Dent de Crolles and Charmant Som summit, offering breathtaking panoramas. There are also serene mountain lakes such as Lake Crozet, and scenic mountain passes like Bellefont Pass, which provides views of Mont Blanc. The region also features preserved alluvial forests and sensitive natural areas like the Bois de la Batie.
The area around Saint-Ismier is ideal for various outdoor activities. You can find numerous hiking trails, ranging from moderate to difficult, leading to many of the natural monuments. For example, there are challenging routes like the 'Craponoz Waterfall – View of the Dent de Crolles loop'. Cyclists can enjoy scenic road cycling routes, including those that pass through mountain passes like Col de Porte. For more details on routes, you can explore the hiking guide or road cycling guide for Saint-Ismier.
Yes, the Chartreuse massif, accessible from Saint-Ismier, is crisscrossed with hiking trails. You can embark on challenging routes such as the 'Col du Coq – Baure Pass loop' or the 'Commemorative plaque – Baure Pass loop'. Many trails lead to summits like Dent de Crolles, offering rewarding views. For a comprehensive list of trails, refer to the hiking guide around Saint-Ismier.
The best time to visit largely depends on the activity. Spring and autumn offer pleasant temperatures for hiking and exploring the lower-altitude natural areas like the Bois de la Batie. For higher mountain summits such as Dent de Crolles or Charmant Som summit, late spring to early autumn (June to September) is generally recommended when trails are clear of snow and weather conditions are more stable. Winter visits are possible for snowshoeing or skiing in certain areas, but require appropriate gear and awareness of conditions.
The diverse ecosystems around Saint-Ismier support various wildlife. At the Espace naturel sensible du Bois de la Batie, you might spot signs of beavers and moorhens, or observe kingfishers and dragonflies near the water. In the higher altitudes of the Chartreuse massif, around peaks like Chamechaude and Dent de Crolles, the diverse fauna includes chamois, which visitors have reported seeing, especially during early morning bivouacs.
Absolutely. The region is renowned for its exceptional viewpoints. Dent de Crolles offers a magnificent 360-degree view over the entire Grésivaudan valley, extending to the Belledonne massif and beyond. Charmant Som summit also provides a spectacular panorama. For a closer view of the valley and Grenoble Basin, the Revollat Cross is an excellent spot, facing the Chartreuse.
The Espace naturel sensible du Bois de la Batie is a significant preserved alluvial forest within Saint-Ismier. It's a testament to the rich ecology of the Grésivaudan valley, featuring a preserved body of water, a conservatory orchard, and educational ponds. It offers equipped trails for observing local flora and fauna, making it a valuable natural retreat close to Grenoble.
Ascents to major summits like Dent de Crolles are considered technical and challenging. While rewarding with incredible views, they often involve steep sections and require concentration. Steel cables are installed in more difficult parts to assist climbers. Charmant Som summit, while still a significant climb, is generally considered less technical, with a road leading partway up, making its final ascent more accessible.
Yes, the Chartreuse massif features several notable mountain passes. Col de Porte (1326 m) and Col du Cucheron are excellent starting points for numerous hikes and offer scenic drives through the mountainous landscape. Bellefont Pass, at 1,902 meters, also provides a breathtaking view and can be reached via hiking trails.
Visitors consistently praise the breathtaking panoramic views from the summits and viewpoints, such as those from Dent de Crolles and Charmant Som summit. The sense of accomplishment after a challenging ascent, the beauty of mountain lakes like Lake Crozet, and the opportunity to connect with nature in preserved areas like the Bois de la Batie are also highly valued.


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