Most first-year festivals build a site from scratch: a field, a fence, a stack of generators. Fort X is doing the opposite. On September 5, 2026, the new boutique electronic event takes over Mokrice Castle, a fortress dating to 1444 in the hills above Rajec, near Ljubljana, and simply uses what's already there.
What does the site actually look like?
Instead of a temporary festival footprint, organizers BSH Events and Main Stage Travel have built the programming around the castle's own geography. Stages sit inside hidden courtyards, along woodland paths and against centuries-old stone walls, with projection mapping brought in to transform the architecture once the sun goes down. It's the same site-specific instinct behind BSH's other European events, applied to a structure that's been standing since before the printing press reached most of Europe.
Who's actually playing?
The bill leans deep and melodic rather than peak-time: Dixon, the Innervisions co-founder whose sets are built for exactly this kind of long-arc, sunrise-adjacent room, tops a lineup that also includes Maceo Plex, Jimi Jules, Butch, Nic Fanciulli and a DJ set from Âme. Fiona Kraft and Mimi x Fy round out the international names, alongside Slovenian and Balkan artists Aney F., Elena Mikac, Joe Quinn and Pablo Panda, who give the bill a regional anchor rather than treating the country as just scenery.
Organizers are keeping capacity intentionally limited and structuring the day around longer sets, with programming carrying through into Sunday morning sunrise sessions. That's a deliberate trade of scale for intimacy: fewer wristbands, more room per DJ to actually build something.
With capacity intentionally limited, organizers expect the inaugural edition to sell out ahead of September.
Why Slovenia, why now?
Mokrice Castle already runs as a golf hotel and event venue, but a one-day electronic festival inside its walls is a new use for the site. Slovenia sits a short drive from Ljubljana and the Croatian border, putting Fort X within reach of the wider Balkan and Central European clubbing circuit without competing directly with the region's bigger destination festivals. For a debut, that's a smart lane: distinctive enough to travel for, small enough to sell out on a strong booking alone.
