4.6
(705)
6,826
runners
341
runs
Jogging around Innerstetalsperre offers diverse routes within the Harz region, characterized by its reservoir and surrounding natural landscapes. The area features a significant dam, a three-kilometer-long artificial lake, and former railway lines repurposed into running paths. Runners can explore valleys, meadows, and forests, providing a tranquil backdrop for exercise. The terrain includes predominantly paved paths around the reservoir and secluded trails winding through natural surroundings.
Last updated: October 1, 2026
31
runners
10.8km
01:07
70m
60m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
14
runners
19.9km
02:22
490m
480m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

4
runners
13.8km
01:35
320m
330m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(39)
372
runners
8.90km
00:56
80m
80m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
6
runners
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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Lautenthal is always worth a trip with the MTB. Lautenthal offers a great starting point, has one or two natural trails itself (mostly hiking trails) and it is especially worth looking in the direction of Wildemann.
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The Innerstetalsperre dam is an earth dam with a multi-layered, external asphalt concrete seal. It has a control gallery along its entire length in the upstream foundation wall. In front of the upstream toe of the dam is a high-water overflow tower, into which the bottom outlet is also integrated. The water from the Innerstetalsperre can be pumped via a 4.6 km long pressure pipeline to the Granetalsperre located to the east, where it can be used for drinking water treatment. Source: Wikipedia
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It rolls very well here on the Innersteradweg. This part on the former railway line is fun.
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One of the benches overlooking the water of the dam.
2
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Nice to cycle along here.
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Nice to cycle along here.
3
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Well-visited place by the water.
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There are over 340 running routes available around Innerstetalsperre, catering to various fitness levels. You'll find a wide selection of trails, from easy jogs to more challenging runs through the Harz landscape.
The majority of running trails around Innerstetalsperre are classified as moderate, with over 245 such routes. There are also about 50 easy routes for beginners or those seeking a relaxed pace, and around 48 more difficult options for experienced runners looking for a challenge.
Yes, the Innerstetalsperre is well-known for its circular running paths. A popular option is the approximately seven-kilometer-long path that encircles the reservoir, offering continuous running with varying views. For a slightly longer moderate loop, consider the Running loop from Hauptdamm, which is about 10.7 km.
Many running routes offer scenic views of the reservoir and the surrounding Harz landscape. You can spot landmarks like the impressive Innerste Reservoir Overflow Tower, or run along the Innerste Cycle Path, which follows a former railway line. The area is rich in natural beauty, with valleys, mountains, meadows, and forests.
Yes, the area offers routes suitable for families. The predominantly paved paths around the reservoir are generally considered moderate and have minimal technical difficulty, making them accessible. The shallow shore zones of the reservoir also make it a family-friendly destination for other activities.
While specific leash rules for all trails aren't detailed, the Harz region generally welcomes dogs on trails. It's always advisable to keep your dog on a leash, especially in nature protection areas and near wildlife, to ensure a safe and enjoyable experience for everyone.
Parking is available at the Innerstetalsperre Parking Area. This provides convenient access to the various running trails around the reservoir.
The running routes in Innerstetalsperre are highly rated by the komoot community, with an average score of 4.6 stars from over 500 reviews. Runners often praise the expansive reservoir views, the tranquil forested valleys, and the unique experience of running along repurposed railway lines like the Innerstetalbahn Rail Trail – Großes Schlackental loop from Innerstetalsperre.
Yes, after your run, you can find refreshment at places like the Berghof am See, which serves as a popular rest stop and offers a restaurant. There's also Mende's Lake View - Restaurant, providing options for dining with scenic views.
The Innerstetalsperre offers a beautiful setting for running throughout much of the year. Spring and autumn provide pleasant temperatures and vibrant scenery. Even in winter, the old railway route, which is part of the long-distance Weser-Harz-Heide cycle path, is used for cross-country skiing, suggesting it can be accessible for winter running, though conditions may vary.
Absolutely! The Innerstetalsperre is a hub for various outdoor pursuits. Besides running, you can enjoy swimming in the lake's shallow shore zones, sailing, fishing, windsurfing, or rowing. The area is designed for a wide range of activities, making it a great destination for a full day out.


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