Triglav National Park covers 880 square kilometres of the Julian Alps and includes most of the country's highest terrain, including Mount Triglav itself at 2,864 metres. Lake Bohinj sits inside the park's southern boundary, which makes it the most accessible point of entry. Roads end a short distance west of the lake; from there, walking is the only way deeper into the mountains.
Day hikes from the lake go up to the Vogar plateau, through the karst meadows above Stara Fuzina, or to the Black Lake (Crno jezero) and the rest of the Triglav Lakes Valley. The Seven Lakes circuit, an overnight trek through a chain of glacial tarns at over 1,800 metres, is one of the great Alpine walks. Routes are well-marked but the weather changes fast at altitude — pack proper rain gear and start early.