Brestovec, Kremenjak e Trstelj

This loop itinerary winds through the ridges and forests of the Gorizia-Slovene Karst, touching on two iconic peaks: Kremenjak and Trstelj, both spectacular viewpoints.

The first striking moment of the tour is the crossing of the Brestovec gunboat tunnel, a military work of the Great War. Long and carved into the rock, the tunnel can be traveled by saddle or on foot, does not require a headlamp thanks to the illuminated trail markers, and provides a unique thrill between history and adventure.

After a quick descent, we leave Italian territory and continue into Slovenia, coseggiando the edge of the karst plateau toward Kremenjak. Kremenjak, just above the village of Jamiano, offers breathtaking views of the Gulf of Trieste, ranging from Croatia to the Venetian lagoon. It is one of the most striking natural balconies in the area. The trail continues through dense forests and cart tracks until it reaches the summit of Trstelj (624 meters), the highest point in the Slovenian Karst, where a wide 360-degree panorama opens up, with views of the Julian Alps, the Soča and the Adriatic. Just downstream there is a hut where you can refresh yourself before tackling the challenging descent to the Vipava Valley.

The route alternates between single track, fast gravel and short technical sections, with evenly distributed climbs and fun descents. It is suitable for trained bikers with good basic technique and a desire to explore historic and natural landscapes.

The Brestovec gun gallery:

Kremenjak summit viewpoint:

Trstelj summit: