JK27

The JK27 — the Julius Kugy Alpine Trail — is a 720 km loop trail through the Southern Alps, crossing Austria, Slovenia, and Italy across 30 stages with 45,000 metres of total elevation gain. Part of the International Walking Network, it is one of the defining tripoint mountain circuits in Europe and typically requires 35–40 days to complete in full.

About the JK27

The Julius Kugy Alpine Trail takes its name from Julius Kugy (1858–1944), a Trieste-born alpinist and botanist who spent seven decades pioneering first ascents and new routes across the Julian Alps. Kugy’s memoir Aus dem Leben eines Bergsteigers (From the Life of a Mountaineer) remains one of alpine literature’s most celebrated works, and naming a 720 km international loop after him reflects the scale of his influence on Southern Alpine exploration. He made more than 100 documented first ascents in the Julian Alps during his lifetime, mapping a mountain world that most of his contemporaries had barely entered.

The trail owes its existence to Milan Naprudnik (1927–2021), a Slovenian mountaineer who spent much of his life campaigning for a walking route that would bind the three nations — Austria, Slovenia, and Italy — sharing this mountain arc. Formal development began in 2014 under a consortium of Alpine clubs: Alpenverein Kärnten, the Planinska zveza Slovenije, and the Club Alpino Italiano of Friuli-Venezia Giulia. As of 2026, the JK27 is fully waymarked, officially designated within the International Walking Network (IWN), and managed by the Julius Kugy Forum, whose member organisations coordinate hut access, waymarking maintenance, and route updates across all three countries. The official website at julius-kugy-alpine-trail.eu publishes stage-by-stage GPX files and annual hut updates.

The route begins and ends at Berthaütte (1,525 m) in Austrian Carinthia, forming a true loop rather than a point-to-point traverse. The 30 official stages average roughly 24 km each. Cumulative ascent is 45,000 m — equivalent to ascending Everest from sea level more than five times — distributed over approximately 270 hours of walking time. The lowest point on the trail, at just 198 m, sits on the Italian fringe near Resiutta; the highest, 2,401 m at Dom Planika pod Triglavom in Slovenia’s Triglav National Park, is reached on Stage 11.

Six cities and 50 villages lie along the route. The trail crosses 56 mountain passes, tags 24 named summits, passes through one national park and seven designated nature reserves, and intersects with three other major European trails: the Via Alpina, the Sentiero Italia, and the Alpe Adria Trail. Ninety-nine documented alternative stages allow hikers to adapt the route to conditions, add summit variations, or bypass technical sections after bad weather — a flexibility that makes the JK27 workable for a wider range of fitness levels than the headline statistics might suggest.

Difficulty varies significantly by section. Stages in the Triglav massif involve exposed ridge crossings graded sehr schwer (very difficult) under Austrian mountain conventions. Stages through the Italian Prealps and Carinthian valleys tend toward moderate and are fully accessible to experienced hill-walkers without alpine climbing background. Anyone considering the full 30-stage loop should have solid alpine experience, particularly for the high Slovenian sections between Stages 9 and 13. If you’re planning your first major multi-day alpine circuit, a detailed trail guide to a demanding route like the Theth to Valbona walk in Albania provides useful context on managing hut systems and high-mountain logistics before committing to 30 consecutive stages of the JK27.

Route Overview & Stages

The JK27 divides into five distinct regional sections, each with its own terrain character, infrastructure density, and difficulty profile. The table below groups the 30 stages by region with approximate distances and key waypoints.

Highlights & Points of Interest

• Berthaütte (1,525 m) — Carinthia, Austria: The loop’s official start and finish, this mountain hut sits at 1,525 m in the Austrian Karawanken and serves as the natural base for acclimatisation before Stage 1. The surrounding ridgeline gives immediate views south across to Slovenian peaks, and the hut itself provides a symbolic framing for the entire three-country circuit ahead.
• Dom Planika pod Triglavom (2,401 m) — Triglav National Park, Slovenia: The JK27’s highest point is reached on Stage 11 near this mountain hut just below Triglav, Slovenia’s 2,864 m national mountain. The panorama from this elevation, extending across Triglav National Park toward the Adriatic on clear days, is among the most expansive views anywhere in the Eastern Alps.
• Triglav National Park — Slovenia: Stages 10–13 thread through Slovenia’s only national park, a UNESCO-recognised biosphere reserve covering 880 km². The terrain here is classic Alpine limestone karst — dramatic cliff faces, emerald glacial lakes, and passes above 2,000 m that require careful route-finding in poor visibility.
• Kamniško-Savinjske Alpe — Slovenia: The Kamnik-Savinja Alps section (Stages 5–9) presents a different character from the Triglav massif: deeper forest valleys, traditional Slovenian alpine farms, and sharp dolomite ridges. The Kamniška Bistrica gorge is a particular visual highlight, and this section has noticeably fewer other hikers than the Triglav stages.
• Kobarid — Goriška, Slovenia: This small town near the turquoise Soça river carries deep First World War history — the Battle of Caporetto (1917) was fought nearby, and its museum is widely regarded as one of the finest WWI memorials in Europe. A natural rest stop between the Slovenian high-mountain sections and the Italian Prealps, Kobarid has good food, accommodation, and resupply options.
• Prealpi Giulie & Prealpi Carniche — Friuli-Venezia Giulia, Italy: The longest section of the JK27 (Stages 14–24) crosses the Julian and Carnian Prealps of northeast Italy, passing through the historic Friulian market town of Tolmezzo and the village of Resiutta. Cultural and archaeological sites connected to the region’s Friulian and Ladino heritage appear throughout these lower-elevation stages.
• Wolayer See — Carinthia, Austria: This glacial lake sits on the Austrian-Italian border in the Karnische Alpen at around 1,960 m. In June 2024 a peace sculpture was unveiled here, symbolising the cross-border cooperation that underpins the JK27 project. The lake’s setting is one of the most scenic rest points on the return legs of the circuit.
• Gailtaler Alpen — Carinthia, Austria: The final stages (27–30) follow the Gailtaler Alpen ridge back toward Berthaütte. Lower in elevation than the Triglav sections, these stages move through traditional Carinthian alpine villages, dairy farms, and mixed woodland that provides a gradual physical and visual unwinding after the intensity of the high-mountain stages.

Practical Information

Best Time to Hike

The JK27 season runs from late June to early October. The high Triglav sections (Stages 10–13) are inaccessible to most hikers until late June due to persistent snowpack, and remain potentially hazardous on north-facing slopes until mid-July in heavy snow years. The Italian Prealps stages can be hiked from May at lower elevations but become hot and humid through August below 800 m.

The optimum window is mid-July to mid-September. July brings the longest daylight hours (17+ at this latitude) and the most reliable conditions in the high Slovenian sectors. August is the peak season for mountain huts — all 17 facilities on the official route are open and staffed, though booking ahead is essential for Stages 10–13. September offers cooler temperatures, thinner crowds, and spectacular autumn colour through the Slovenian and Carinthian forests; these conditions are ideal for the lower-elevation stages. Starting the full loop before 20 June or after 15 September risks finding key high-mountain passages snowbound or huts closed.

Accommodation

Seventeen mountain huts (Schutzhütten / planinske koçe / rifugi) with overnight accommodation and 13 village lodging options are distributed across the three countries. As of 2026, dormitory beds in huts typically cost €25–40 per night (approximately $27–$44 USD), with half-board (dinner and breakfast) adding a further €20–35. Private rooms, where available, run €50–90 per night.

Italian rifugi on Stages 14–24 are generally well-supplied and often include hot showers and wine lists; Austrian Hütten on Stages 1–4 and 25–30 tend toward traditional Carinthian alpine fare — Kasnocken, Kärntner Kasnudeln — at comparable prices. Wild camping is permitted across most sections but is explicitly prohibited within Triglav National Park and Italian nature reserves. Budget for designated hut accommodation on Stages 10–16 at minimum. July and August bookings for the Triglav stages should be made at least four to six weeks in advance.

Getting There & Back

Because the JK27 is a complete loop, the main logistical task is reaching Berthaütte (1,525 m) in Carinthia. The closest regional transport hub is Villach, 40 km to the west, served by direct trains from Vienna (3 hours 30 minutes), Ljubljana (1 hour 10 minutes), and Munich (3 hours 40 minutes via Salzburg). From Villach, regional buses connect to Feistritz im Rosental and Bad Eisenkappel, from which Berthaütte is accessible by taxi or a short 3 km approach walk.

Alternative entry and exit points are built into the trail design: Villach-Warmbad, Faak am See, Bad Eisenkappel, Kobarid, Resiutta, and Tolmezzo all have bus connections and serve as natural staging points for partial traverses. The closest international airports are Klagenfurt (KLU), 60 km from Berthaütte, and Ljubljana Jože Pučnik (LJU), approximately 90 km to the east. Udine (TRS) or Trieste airports serve hikers starting from the Italian sections.

Permits & Fees

There is no trail permit or thru-hike registration fee for the JK27. The route is free to walk in its entirety. Entry into Triglav National Park carries no access charge for hikers, though overnight stays must use designated huts or approved camping areas within park boundaries. Some Italian nature reserves within the Prealpi Giulie have day-use parking fees for drivers but impose no charge on hikers passing through on foot. Austrian Alpine Club (Alpenverein) membership, at approximately €60 per year as of 2026, provides hut discounts of 30–50% at Austrian and German mountain huts — easily recovered over a 30-stage trip.

Gear & Packing List

The JK27 demands a pack that can handle 30 days of alpine terrain across three countries: variable weather, significant daily elevation swings, and the need to carry emergency bivouac gear for high-mountain stages where hut gaps can reach 20+ km. For a standard thru-hike using the hut network throughout, a 50–60 L pack is the practical volume range.

Hikers prioritising comfort and load transfer for the full 30 stages should look at the Deuter Aircontact Core 50+10, which offers excellent back ventilation and a suspension system designed for loads up to 18 kg — important across the long Italian stages where midday temperatures can reach 30 °C and a well-ventilated back panel is genuinely useful. The Osprey Atmos AG 50 is another proven European thru-hiker’s pack with anti-gravity suspension and a compact profile that works well on tight via ferrata passages.

Ultralight-focused hikers who keep base weight under 7 kg can make the Zpacks Arc Haul Ultra 60L work across all 30 stages. At approximately 510 g, it handles heavier food-carry loads between resupply points better than its weight suggests, though it requires careful packing discipline on the technical Triglav stages.

Beyond the pack, essential items include microspikes (mandatory for early-season Triglav crossings before mid-July), trekking poles (useful on every stage), a waterproof shell rated to at least 10,000 mm hydrostatic head, and a sleeping bag rated to 0 °C for hut nights above 1,800 m. Calorie planning is worth doing seriously before departure — the daily calorie requirements for full alpine hiking days run significantly higher than most hikers initially estimate, particularly on big-elevation stages with 1,800+ m of ascent. If you’re still deciding on a pack, the 2026 ultralight backpack roundup covers seven tested options across different volume and weight classes.

Frequently Asked Questions

How long does it take to hike the full JK27?
The 30 official stages cover 720 km with 45,000 m of ascent and approximately 270 hours of walking time. At a steady pace of 7–8 hiking hours per day, the trail takes 34–38 days, factoring in rest days and weather delays for the high Triglav sections. Strong, experienced hikers have completed it in fewer than 30 days; most thru-hikers targeting the full loop should realistically budget 5–6 weeks including travel and buffer days.

Is the JK27 technically difficult?
Difficulty varies substantially by section. Stages 10–13 in Triglav National Park cross exposed ridge terrain graded sehr schwer (very difficult) and require confident movement on steep, rocky ground. Italian Prealps stages (14–24) and the Carinthian valley stages (25–30) are largely moderate. A minimum of solid alpine hiking experience — surefootedness on loose rock without ropes — is required before attempting the full loop unsupported.

Can I hike only part of the JK27?
Yes. The three most popular partial routes are the Karawanken–Slovenian Alps section (Stages 1–9, approximately 205 km), the Triglav National Park circuit (Stages 9–14, approximately 115 km), and the Italian Prealps traverse (Stages 14–22, approximately 200 km). All three can be completed as independent point-to-point trips using the trail’s bus-connected entry and exit villages, and all three represent excellent multi-week alpine routes in their own right.

What are the best starting points if I’m not doing the full loop?
Villach-Warmbad in Austria and Kobarid in Slovenia are the two most accessible entry points with direct public transport links. Villach-Warmbad suits hikers targeting the Austrian and early Slovenian stages; Kobarid is the natural starting point for those focusing on the Julian Alps and Italian Prealps sections. Tolmezzo in Friuli is the best access point for the central Italian stages (14–20).

Who was Julius Kugy, and why is the trail named after him?
Julius Kugy (1858–1944) was a Trieste-born alpinist, botanist, and writer who made more than 100 first ascents in the Julian Alps and wrote extensively about the mountains in works that shaped how an entire generation understood the Southern Alps. The JK27 traverses the mountain ranges he explored most thoroughly and connects the three countries — Austria, Slovenia, and Italy — that share his alpine legacy. A peace sculpture unveiled at Wolayer See in June 2024 honours that cross-border spirit.