Triglav National Park covers 880 square kilometres, or 3% of the territory of Slovenia. Mountains, rivers and lakes, forests, and mountain pastures and meadows are interwoven with a rich cultural heritage.

The Triglav National Park extends along the Italian border and close to the Austrian border in the north-west of Slovenia, that is, in the south-eastern section of the Alps. Its territory is nearly identical with that occupied by the Eastern Julian Alps.

Due to the beauty of the landscape in Bohinj and its precious natural heritage, a good part of the Bohinj regions has been incorporated in the territory of Triglav National Park, Slovenia's only national park. The Triglav National Park (TNP) is the only Slovenian national park. The park was named after Triglav, the highest mountain in the heart of the park, which is also the highest summit in Slovenia (2864 m).

The origin of the name Triglav is rather uncertain. Triglav ("three-headed") owes its name to its characteristic shape as seen from the south-east side or to the highest Slavic deity who was supposed to have its throne on the top of the mountain. The mountain is a true national symbol and is featured on the national coat of arms and the flag. The Triglav National Park is among the earliest European parks; the first protection dates back to 1924 when the Alpine Conservation Park was founded.