Pirin

Национален парк "Пирин" occupies the high spine of a mountain wedged between the Struma and the Mesta, and it is the marble that makes it. Northern Pirin is built of a Palaeozoic granite core with a thick lid of Triassic marble laid over it, and the two weather completely differently: the granite gives rounded, gravelly summits, while the marble gives white pavements, dolines, sinkholes and the pale glare that reaches the valley on a clear day. Vihren, at 2,914 metres the second-highest peak in Bulgaria and third on the Balkan Peninsula, is marble to the top. So is Kutelo behind it, and the ridge that joins them — Koncheto, "the little horse" — narrows to about half a metre of rock with drops of some three hundred metres on the north side and two hundred on the south. A steel cable was bolted along it for a reason.

The park began small and under a different name. On 8 November 1962 the Council of Ministers declared Народен парк "Вихрен" over 6,736 hectares around the peak itself; it was renamed and enlarged to Народен парк "Пирин" in September 1974, took further additions through 1976 and 1987, and was finally recategorised as a national park by Заповед № 395 of 15 October 1999 — the order that, with its two siblings for Rila and Central Balkan, put all three parks into the schedule of the Protected Areas Act. The register now gives 40,370.54 hectares, restated in November 2024 after the boundary was measured against the cadastre. UNESCO inscribed the park as a World Heritage site in 1983 and extended it in 2010.

Glaciation did the rest of the work. Something like 176 lakes lie in the cirques, most of them small enough to walk around in twenty minutes: Popovo, at 12.4 hectares and 29.5 metres deep, is the largest, and the Banderishki, Vasilashki, Valyavishki and Kremenski groups fill the basins below the main ridge. The forests are the other reason the park exists. Two Balkan endemic pines grow here — the Bosnian pine, Pinus heldreichii, which Bulgarians call мура, and the Macedonian pine, Pinus peuce, бяла мура — and one of the Bosnian pines has become the park's emblem. Baikushev's pine stands near the Banderitsa hut, is roughly 1,300 years old and about 24 metres tall, and was identified in 1897 by the forester Konstantin Baikushev whose name it carries. It was a young tree when Asparuh founded the Bulgarian state in 681. Two strict reserves sit inside the park and only two: Bayuvi dupki – Dzhindzhiritsa, declared in 1934 and among the oldest in the country, and Yulen, from 1994.

What's worth knowing before you go

Bansko is the gateway and the complication. It is reachable on the 760-millimetre narrow-gauge line from Septemvri, the last such railway in Bulgaria and a five-hour crawl over the Avramovo saddle at 1,267 metres — the highest station in the Balkans — which is worth doing for itself rather than for the speed. From town, the road up the Banderitsa valley reaches the Vihren hut at 1,950 metres, and that is where most ascents of Vihren and the traverse to Koncheto begin. Dobrinishte, a few kilometres east, is the other railhead; Sandanski and Melnik give access from the hot, Mediterranean-feeling south, where the Struma valley grows figs.

July to September is the practical window on the high ground — snow lingers in the north-facing cirques well into summer, and Koncheto in cloud or wind is not a scramble to attempt on schedule. The ski zone above Bansko operates inside the park under a concession, which is the long-running argument here and the reason UNESCO's monitoring missions keep returning; it also explains the odd shape of the boundary above town, where the mapped park breaks into a scatter of fragments along the northern edge. If you walk one thing, make it the Banderitsa circuit past Baikushev's pine to the Vihren hut early, before the day-trippers come up from the lifts. The tree is fenced and unremarkable at a glance, which is the point — nothing about it announces that it predates the country.