4.9
(7)
50
riders
10
rides
Gravel biking around Cerkno offers diverse terrain where the Alpine world meets the Mediterranean, characterized by rolling hills, green valleys, and challenging mountain sections. The region features extensive forest areas and the Idrijca River, providing varied landscapes for cycling. This area is crisscrossed with numerous trails, making it suitable for exploring picturesque villages and natural features.
Last updated: May 22, 2026
5.0
(3)
10
riders
43.1km
03:12
960m
960m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
9
riders
65.5km
04:51
1,560m
1,560m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(1)
10
riders
26.7km
02:14
690m
690m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(2)
6
riders
48.9km
03:27
1,120m
1,120m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
4
riders
43.2km
03:07
1,090m
1,090m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Divje jezero is a karst siphon lake (Vaucluse spring), located approximately 2 km south of Idrija. The type of karst spring - Vaucluse spring is named after the Fontaine-de-Vaucluse spring in the Vaucluse region of Provence in southern France, east of Avignon. Springs of this type are characterized by the fact that water flows to the surface from great depths under pressure through steep channels. The lake lies in a stone cauldron under the hundred-meter cliffs that border this northern edge of the Črnovrška plateau. Divje jezero is also a karst spring, as water flows into the lake from a steeply descending trench, which has been explored to a depth of 160 m so far. Although the lake surface is usually calm, after heavy rains there can be strong eruptions of water, up to 60 m³/s. The Jezernica River flows from Divje Jezero, which is the shortest surface-flowing river in Slovenia and flows into the Idrijca River after 55 meters. The water temperature in the lake fluctuates only between 7 and 10 °C throughout the year. The lake was protected as a natural monument in 1967 and since 1972 has been arranged for visitors as the first Slovenian open-air museum.
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The city of Idrija is famous for its mercury mines and factories that have been active for several hundred years.
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Idrija is a small town that owes its fame to its historic mine and mercury extraction facilities. Mercury mining and production began several centuries ago.
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At 974 metres, Črvov vrh (also known as Črvov grič) is the highest peak of the Šentviška plateau, rising above the right bank of the Idrijca and the left bank of the Bača. From the summit, where transmitters and a registration box are located, there is a beautiful view of the peaks rising above the Idrijca and Bača river basins.
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I recommend a visit by bike or on foot. The lake is truly beautiful but at the same time eerie, as we do not know its exact depths. The shortest river, Jezernica, flows out of it, which flows into the Idrijca after a few meters. You start at one of the larger parking lots in Idrija, from where it is about 3km to Divje Jezera. An ideal starting point also for those who visit the city with a camper. On the way to the lake (if we pay attention), we can see the remains of the Italian caves and bunkers.
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I recommend Idrija as a starting point. You can choose an easier 7km route along the main road. Those with more fitness and who enjoy riding on forest roads and paths, choose the route along Ključe via Idrijski log or Zadlog with a descent into the valley of the Idrijca and Belca. As a reward, treat yourself to swimming at the confluence of the Idrijca and Belca rivers in Lajšt 😉😉 There are several cycling route options to choose from in the komoot app.
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Lovely campsite with a bar serving ice cold beer. All reasonably priced. Very friendly
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The Cerkno region offers a diverse network of over 10 gravel bike trails. These routes primarily feature challenging terrain, characterized by rolling hills, green valleys, and significant elevation changes, making them suitable for experienced riders.
Gravel biking around Cerkno is defined by varied terrain where the Alpine world meets the Mediterranean. You can expect a mix of rolling hills, green valleys, and dense forests, with some sections presenting more challenging mountain terrains. The routes often feature significant elevation changes, providing a rewarding experience for riders.
While the Cerkno region is known for its more challenging gravel routes, with all 11 listed tours rated as difficult, the diverse landscape does offer potential for exploring picturesque villages and natural features at a more relaxed pace. For families or beginners, consider exploring shorter sections of trails or looking into e-mountain bike rentals available in the area, which can assist with steeper climbs.
Many gravel routes in Cerkno offer stunning views and pass by significant natural and historical sites. For instance, the area around the Idrijca River and Divje Babe Cave – Site of the Neanderthal Flute is particularly scenic. You might also encounter routes that lead towards the Porezen Summit or offer views of the Bača river and its valley.
The most popular months for gravel biking in Cerkno are July and August, when the weather is generally warm and stable. However, the region's blend of Alpine and Mediterranean climates means it offers opportunities for active holidays throughout the year. Spring and autumn can also provide excellent riding conditions with cooler temperatures and vibrant scenery.
Yes, several routes explore the beautiful Idrijca River and Wild Lake (Divje Jezero) area. For example, the Klavže Dam – Divje Jezero (Wild Lake) loop from Idrija is a popular choice, offering views of the river and surrounding forests. Another option is the Divje Jezero (Wild Lake) – Divje Jezero Natural Monument loop from Idrija, which leads through natural monuments and forested areas.
The komoot community highly rates the gravel biking experience in Cerkno, with an average score of 4.8 stars from over 6 reviews. Riders often praise the diverse terrain, the blend of rolling hills and challenging mountain sections, and the opportunity to explore picturesque villages and natural features. The extensive forest areas and the presence of the Idrijca River also contribute to a rewarding outdoor adventure.
Yes, for experienced riders seeking a longer challenge, the Klavže Dam – Idrija town centre loop from Riže is a difficult 40.5-mile (65.2 km) trail. This route navigates through varied terrain, connecting historical sites and natural beauty, and typically takes over 6 hours to complete.
Many of the gravel routes in Cerkno are designed as loops, allowing you to start and end at the same point. Examples include the Divje Jezero (Wild Lake) – Klavže Dam loop from Spodnja Idrija, which covers nearly 49 km, and the Camp Šorli Koritnica – Pitna Voda Water Fountain loop from Grahovo ob Bači, offering a 26.8 km ride.
Yes, for those looking for additional activities, the Adrenaline Park Cerkno is located at the Cerkno Ski Resort. It offers various challenges, including zip-lines and a climbing wall, suitable for different age groups, providing a fun alternative or complement to your gravel biking adventure.
Gravel routes in Cerkno often feature significant elevation gains, reflecting the region's hilly and mountainous terrain. For example, routes can have ascents ranging from over 700 meters, such as the Divje Jezero (Wild Lake) loop, to more than 1500 meters for longer trails like the Klavže Dam – Idrija town centre loop, providing a challenging workout for riders.


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