Natural monuments around Merlas are primarily found within the Chartreuse mountains, a region known for its diverse natural features and geological formations. This area offers a landscape characterized by streams, gorges, and mountain passes. Visitors can explore various natural attractions that highlight the unique geology and scenic beauty of the Chartreuse massif. The region provides opportunities to experience natural features such as deep ravines and elevated viewpoints.
Last updated: June 20, 2026
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A little "kick in the pants" to get out! Cool and in the shade!
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The coolness in these gorges is much appreciated when it's close to a heatwave on the plains! And the wild atmosphere of the small road through these gorges (before reaching a busy road for a beautiful descent) is good (a little "kick in the ass" to get out!).
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Beautiful bridge over the gorge
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As you travel to the Grenant stream above La Bridoire, you will discover a hidden stream that winds through a lush and tranquil forest in the heart of the Chartreuse mountains. The area around the stream is teeming with wildlife and you will often see birds and other woodland creatures. As you listen to the soothing sound of flowing water, let your mind escape into nature.
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Large waterfall on the ascent of Mont Grelle or Beauvoir
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The Col des Égaux is a pass in the Chartreuse massif at an altitude of 958 m and located in the south of the Savoie department.
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The Col des Égaux from Saint-Jean-de-Couz is 4.6 kilometers long with a total elevation gain of 319 meters. The average slope is 6.93% with maximum slopes of 9.3%.
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Shaded pass that allows you to reach Corbel from the Couz valley.
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The natural monuments around Merlas are primarily located within the Chartreuse mountains, offering a diverse landscape. You can explore features such as winding streams like the Grenant Stream, magnificent gorges like Gorges du Crossey, and mountain passes such as Col des Égaux. The region also features elevated viewpoints offering scenic vistas of glacial lakes, for example, the Croix des Cochettes View of Lac de Paladru.
Yes, there are natural monuments suitable for families. The Old Saint-Martin Bridge, which crosses the splendid gorges of Guiers Vif, is considered family-friendly. It offers a nice discovery and allows you to walk across a very old and beautiful bridge over a narrow gorge.
For expansive views, the Croix des Cochettes View of Lac de Paladru is a must-see. It offers amazing views of the glacial Lac de Paladru from the hills. Additionally, the Col des Égaux is a mountain pass that provides a viewpoint, often uncrowded and shaded.
The area around Merlas, particularly within the Chartreuse mountains, offers various outdoor activities. You can find numerous routes for hiking, mountain biking, and running. For hiking, explore options like the 'Lac de Saint-Sixte loop' or 'Ruins of Château Descours loop'. Mountain biking enthusiasts can tackle challenging routes such as the 'Canal de l'Herretang – Saint Joseph de rivière loop'. Runners have choices like the 'Carpodrome la libellule loop'. You can find more details on these activities and routes in the hiking guide, MTB guide, and running guide for Merlas.
Yes, the Old Saint-Martin Bridge is a notable historical site among the natural monuments. This very old and beautiful bridge allows you to cross the narrow gorges of Guiers Vif, offering a glimpse into the past while enjoying the natural beauty of the area.
The Chartreuse mountains, where these natural monuments are located, are generally pleasant to visit during spring, summer, and early autumn. During summer, places like Gorges du Crossey offer welcome coolness and shade, which is much appreciated when temperatures are high on the plains. Winter access might be limited or require specific gear due to snow and ice, especially at higher elevations or in shaded gorges.
The region is characterized by its diverse geology, primarily within the Chartreuse massif. You'll encounter deep ravines and gorges, such as Gorges du Crossey and the gorges of Guiers Vif crossed by the Old Saint-Martin Bridge. The presence of glacial lakes, like Lac de Paladru visible from Croix des Cochettes View, also points to the area's glacial history.
The duration of your visit depends on which natural monuments you choose to explore and what activities you plan. A tranquil spot like Grenant Stream might be a shorter, peaceful stop, while exploring the Gorges du Crossey or hiking to a viewpoint like Croix des Cochettes could take a few hours. If you combine multiple sites or undertake longer hikes, a full day or even multiple days would be ideal to fully experience the Chartreuse mountains.
For a tranquil natural setting, the Grenant Stream is highly recommended. It winds through a lush forest, offering soothing sounds of flowing water and opportunities to spot wildlife. If you're looking for a wilder atmosphere, the Gorges du Crossey provides a rugged and shaded environment between the Chartreuse Massif and Voiron.
Visitors particularly appreciate the diverse natural beauty and the opportunities for outdoor activities. The tranquil forest setting of Grenant Stream, the wild atmosphere and coolness of Gorges du Crossey, and the expansive views from Croix des Cochettes View of Lac de Paladru are frequently highlighted. The uncrowded nature of spots like Col des Égaux also adds to the appeal.
Yes, several natural monuments and routes in the Chartreuse mountains offer shade. The Gorges du Crossey are known for their coolness and shade, making them a popular spot during warmer weather. Similarly, the Col des Égaux is described as a shaded mountain pass, providing relief from the sun.


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