4.5
(59)
4,018
runners
214
runs
Jogging routes around Lac Mort are situated in the Auvergne-Rhône-Alpes region, at the foot of the Taillefer massif, approximately 25 km southeast of Grenoble. This glacial lake, elevated by a dam, offers a blend of serene landscapes and varied terrain. The area features alpine scenery and a mix of paved surfaces and accessible paths, providing diverse options for runners. The surrounding Matheysin plateau contributes to a preserved environment suitable for outdoor activities.
Last updated: July 1, 2026
267
runners
22.4km
04:32
1,740m
1,270m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
122
runners
24.0km
03:07
690m
690m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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72
runners
5.36km
00:35
80m
90m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(2)
32
runners
9.62km
01:16
260m
260m
Hard run. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4.0
(1)
27
runners
6.84km
00:47
50m
50m
Hard run. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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The little road that goes down from Cholonge is great, on arrival you have a superb view of the lake
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A high-altitude lake, very quiet and rarely visited. The lake is at an altitude of 2,115 m. It offers breathtaking 360° views.
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Very beautiful panorama once you arrive at the Pierre Percée!
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I did it on gravel, climbing via the Aveillans hill (west), it was fine. Direct descent to Putteville, very limited at the beginning on gravel, much steeper but it was fine.
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1st part very smooth and very pleasant, 2nd part much more technical with a nice climb on a very greasy muddy path, steep slopes and quite technical descents. The final does not take the greenway recently set up and which allows you to avoid the road.
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beautiful course, technical, D+ beautiful singles
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There are over 200 running routes documented around Lac Mort, offering a wide variety of options for all skill levels. This includes 12 easy routes, 44 moderate routes, and 150 difficult routes for more experienced runners.
The running trails around Lac Mort are highly rated by the komoot community, with an average score of 4.3 stars from over 50 reviews. Runners frequently praise the stunning alpine scenery, the serene glacial lakes, and the diverse terrain that caters to different abilities. More than 4,000 runners have used komoot to explore this beautiful region.
Yes, Lac Mort offers several easy running routes suitable for beginners or those looking for a relaxed jog. For example, a popular choice is the 4 km loop around Lac Mort itself, which features a manageable 164 meters of elevation gain and is categorized as easy. You can find 12 easy routes in total.
The terrain around Lac Mort is quite varied. You'll find a mix of paved surfaces and more accessible paths, especially around the lakes. However, as the area is at the foot of the Taillefer massif, some routes venture into more challenging alpine scenery with significant elevation changes. The broader Matheysin plateau also contributes to a diverse landscape.
Yes, many of the running routes around Lac Mort are circular, allowing you to start and finish at the same point. A popular moderate circular route is the Lac Mort – Grand Lake of Laffrey loop from Laffrey, which covers 6.9 km. Another option is the Grand Lake of Laffrey – Grand Lake of Laffrey loop from Laffrey, a 8.2 km moderate path.
The warmer months, particularly summer, are ideal for running around Lac Mort, offering refreshing conditions and a pleasant environment. While the Matheysin plateau experiences distinct seasons, with potentially abundant snow in winter, many trails remain accessible. Always check local conditions, especially during colder months.
While the region is generally welcoming to outdoor enthusiasts, specific regulations regarding dogs on trails can vary. It's always best to keep your dog on a leash and ensure they are well-behaved to respect the preserved natural environment and other visitors. There are no explicit restrictions mentioned for dog-friendly trails in the immediate Lac Mort area, but always practice responsible pet ownership.
Absolutely. For experienced runners seeking a challenge, Lac Mort offers 150 difficult routes. A notable example is the Ut4M 20 Taillefer, a demanding 22.4 km trail leading through the Taillefer massif, often completed in about 4 hours 32 minutes with significant elevation changes.
Yes, the easier, shorter loops around Lac Mort and the Grand Lake of Laffrey are generally suitable for families. These paths often feature minimal elevation gain and a mix of paved and accessible surfaces, making them enjoyable for various ages and fitness levels. The serene environment provides a pleasant outing for everyone.
While specific parking locations are not detailed, the area around Lac Mort and the nearby village of Laffrey are popular starting points for outdoor activities. It is generally possible to find parking in designated areas near the lake access points or in Laffrey. Always look for official parking signs and respect local regulations.
Lac Mort is situated approximately 25 km southeast of Grenoble. While direct public transport options to the immediate lakeside might be limited, you can typically reach the general area via bus services from Grenoble to Laffrey. From Laffrey, you might need to walk or arrange local transport to reach specific trailheads. It's advisable to check current bus schedules and routes with local transport providers.
The village of Laffrey, located near Lac Mort, offers amenities such as cafes, restaurants, and accommodation options. These can be convenient for runners looking to refuel or stay overnight. The broader Matheysin plateau also provides various services for visitors.


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