Vihren is the second-highest peak in Bulgaria and the headline hike of Pirin National Park. The standard route climbs from the Vihren Hut (1,950 m) up a steep marked path through scree and snowfields to the summit at 2,914 m — about three hours up, two down, all in clear weather.
The summit gives a 360-degree view over the rest of the Pirin range and, on a perfectly clear day, as far as Mount Olympus in Greece. The path is straightforward in good conditions but turns serious in cloud or snow; the alternative Koncheto ridge route is one of Bulgaria's most exposed scrambles and is for experienced walkers only. Start early — afternoon storms are common in summer.