Plizio Visual Lab

Trnovačko Lake

Plizio editorial teamUpdated: Jun 2026Data Sources

Lake

Weather…

Trnovačko Lake is a remarkable high-altitude lake in northwestern Montenegro, world-renowned for its distinct heart shape when viewed from above. Located at an elevation of 1,517 meters, it is surrounded by the towering peaks of Maglić, Volujak, and Bioč. Although the lake is situated on Montenegrin territory, it is most frequently accessed by hikers through the Sutjeska National Park in neighboring Bosnia and Herzegovina. The lake is approximately 800 meters long and 700 meters wide, with a maximum depth of around 9 meters. Its waters shimmer in various shades of emerald green and turquoise, depending on the sunlight and sky conditions. The area is part of the Piva Nature Park, protecting a vast region of untouched mountain wilderness and diverse alpine ecosystems. It serves as a popular camping spot and rest area for climbers tackling Mount Maglić, the highest peak in Bosnia and Herzegovina, which rises directly above its shores.

Location: Montenegro
Top sights: Trzivka · Volujak · Trnovački Durmitor
Nearby: Plužine (12 km)

Best time to visit & climate

The most pleasant time to visit is Jun–Aug.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	-2	-1	2	7	11	15	18	18	13	9	4	-1
Rain mm	134	131	121	93	89	83	52	49	104	124	162	152

📋 Practical info

🧭

Getting there

Accessing this heart-shaped glacial lake usually requires a demanding hike, often starting from the Bosnian side near Sutjeska National Park. The trail crosses the border region, navigating through deep forests and steep mountain passes.

📅

Best season

The optimal window for this hike is strictly during the summer months, from July to September, when the high passes are reliably clear of snow. This period gives the safest conditions and the most bustling colors of the surrounding nature.

⛰️

Terrain & paths

The trail to the lake is rugged and strenuous, featuring significant elevation gains and rocky, uneven forest paths. The effort is rewarded by the spectacular amphitheater of high mountains, including Maglić, that steeply surround the water.

🎒

What to bring

High-quality hiking boots and a reliable backpack are absolute necessities for this challenging cross-border trek. Be sure to carry plenty of water, high-energy food, and your passport or ID, as you will be near or crossing international borders.

🅿️

Parking

Most hikers park their vehicles at established trailheads, such as Prijevor in neighboring Bosnia and Herzegovina, before beginning the trek. From these parking areas, the lake can only be reached by a sustained physical effort on foot.

⚠️

Safety

This is a serious wilderness hike where excellent physical fitness and careful route planning are essential for safety. Hikers must be prepared for extreme isolation, lack of mobile signal, and the physical demands of high-altitude trekking.

⏱️

Time needed

The return hike to the lake is a full-day commitment, typically requiring several hours of strenuous walking in each direction. Many experienced hikers choose to bring camping gear to spend the night by the pristine waters.