JK02

The JK02 — the Julius Kugy Alpine Trail — is a 720 km loop trail crossing Austria, Slovenia, and Italy through six mountain ranges and 48 mountain passes in the Southern Alps. Classified as an International Walking Network (IWN) route, it spans 30 stages with 45,000 m of total elevation gain and approximately 270 hours of hiking time.

About the JK02

The Julius Kugy Alpine Trail — designated JK02 in the International Walking Network — is one of the most ambitious long-distance hiking routes in Europe. Named after botanist and alpinist Dr. Julius Kugy (1858–1944), who spent decades mapping and writing about the Julian Alps, the trail circuits the Southern Alps across three countries: Austria’s Carinthia, Slovenia, and Italy’s Friuli-Venezia Giulia region.

The concept was first proposed in 2004 by alpine associations in the three bordering regions. After fifteen years of route development and mapping, a formal tri-national agreement was signed at the three-country border stone in 2020. As of 2026, the trail is fully documented in 30 main stages with 68 alternative variants, and guided bookings are available for the Carinthian sections through Trail Angels GmbH.

The statistics are striking: 720 km of trail, 45,000 m of cumulative elevation gain, a highest point of 2,401 m, and a lowest of just 198 m — showing just how much vertical the route packs in. The terrain breakdown reflects the route’s variety: 290 km of dedicated hiking trails, 160 km of gravel paths, 95 km of natural tracks, 90 km of quiet asphalt, 60 km of vehicle roads, and 3 km of secured fixed-rope passages. Hikers link 6 towns, 42 villages, 28 valleys, and 24 named peaks across six mountain ranges. The trail won Austria’s Federal Ministry for Labour and Economy award for Innovative Flagship Projects in Tourism, recognising its cross-border cultural and economic significance.

Julius Kugy was born in Gorizia (then Austria-Hungary) and spent decades exploring the Eastern Alps, publishing celebrated accounts of the Julian mountains. The trail honours his vision of the Alps as shared European heritage — a theme given particular weight by the route’s deliberate passage through former WWI battlefields where Austro-Hungarian and Italian forces fought for years along the Isonzo Front. For hikers drawn to other dramatic alpine crossings, our guide to the Theth to Valbona Trail in Albania covers another spectacular mountain journey in the Western Balkans.

Route Overview & Stages

The JK02 runs clockwise from Carinthia, Austria, dipping south into Slovenia’s Julian Alps and Triglav National Park, then west and southwest through Friuli-Venezia Giulia in Italy, before turning north to traverse the Gailtaler Alps and Lienzer Dolomites back to Austria. Six distinct mountain ranges — Karawanken, Kamnik–Savinja Alps, Steiner Alps, Julian Alps, Gailtaler Alps, and the Lienzer Dolomites — give the route its extraordinary variety.

Stage 10A provides a lower-altitude valley alternative for unsettled weather. With 68 official alternative variants across all 30 stages, experienced hikers can extend or challenge themselves further while less confident groups can select lower-level options without losing the route’s essential character.

Highlights & Points of Interest

• Wolayer Lake (Wolayersee), Carinthia — 1,960 m: A glacial cirque lake in the Carnic Alps encircled by limestone peaks. The Peace Stone beside the water is inscribed with the words “Blessed are the peacemakers” (Matthew 5:9) — a monument chosen deliberately for a landscape where Austrian and Italian troops fought for four years during WWI. The lake hut (Wolayerseehütte) is a classic overnight stop.
• Triglav National Park, Slovenia: Stages 9–11 traverse Slovenia’s only national park. The Soča River headwaters run turquoise even in peak summer, and Triglav (2,864 m) — Slovenia’s highest mountain and national symbol — dominates the skyline for multiple consecutive days. The park covers 83,807 hectares of protected alpine terrain.
• Kolovrat Open-Air Museum, Friuli-Venezia Giulia / Slovenia border: A preserved WWI ridge battlefield at around 1,150 m with original trenches, gun positions, and shelters intact. Julius Kugy himself witnessed the Isonzo Front fighting in this area; the trail passes through deliberately to contextualise the legacy of the man it honours.
• Monte Matajur (1,641 m), Friuli-Venezia Giulia: A prominent summit in the Julian Prealps with sweeping views south over the Friulian plains. Erwin Rommel led the assault on this peak in October 1917 during the Battle of Caporetto; the summit carries documentation of the action and its significance to the region’s memory.
• Sauris (Zahre), Friuli-Venezia Giulia — 1,200–1,400 m: A German-speaking language island in the Carnic Prealps that has maintained a Bavarian-derived dialect for over 700 years. The village sits above the Lago di Sauris reservoir. The local smoked ham (Prosciutto di Sauris IGP) and rustic rifugi make it one of the most memorable overnight stops on the Italian section.
• Sappada (Pladen), Friuli-Venezia Giulia — 1,200 m: A second Germanic language island on the upper Piave River, noted for traditional “tabià” timber-barn architecture and Dolomitic limestone scenery. Sappada’s dialect is distinct from both standard German and the Sauris variety — a linguistic oddity unique in the Alps.
• Hochstuhl / Stol (2,237 m), Karawanken: The highest point of the Karawanken range straddles the Austria–Slovenia border. Reached in Stage 2, the summit marks an early compass-setting moment — the panorama extends north to the Hohe Tauern glaciers and south to the Julian Alps, showing the vast clockwise circuit ahead.
• Dobratsch Nature Park, Carinthia — 2,166 m: The Dobratsch massif forms the natural gateway at both start and finish of the JK02 loop. Its summit plateau is visible from up to 200 km on clear days. The nature park protects rare alpine flora and hosts a geology and ecology museum documenting the Carnic Arc.

Practical Information

Best Time to Hike

The JK02 is a summer and early-autumn route. The optimal hiking window is mid-June to late September. Snow persists on passes above 1,800 m into late May and early June; the first significant autumn snowfall typically arrives in October on the higher sections.

• June: High passes are generally clear by mid-month; wildflowers peak in alpine meadows. Residual snow possible on Stage 2 (Hochstuhl) and the Triglav National Park approaches. Temperatures 8–18 °C at 1,500 m. Fewer crowds than July or August.
• July–August: Peak season; all huts open and staffed across all three countries. Afternoon thunderstorms are frequent — plan to be below exposed ridges by 13:00. Temperatures 10–22 °C at 1,500 m. Book huts 2–3 weeks ahead for popular Slovenian and Carinthian stages.
• September: Best visibility and stable anticyclonic weather over the Eastern Alps. Temperatures 6–16 °C at elevation; crowds thin sharply after the first week. Some smaller huts at lower altitude close by mid-September — check individual hut websites before departing.
• October onwards: Not recommended without full alpine winter equipment and advanced navigation skills.

Accommodation

The JK02 is built around a dense network of alpine huts — Hütten in Austria, koče in Slovenia, rifugi in Italy — supplemented by guesthouses, B&Bs, and limited organised camping in valley settlements.

• Alpine huts: Dormitory (Matratzenlager) rates run €20–40 per person per night; private rooms cost €35–60. Slovenian koče tend to be slightly cheaper than Italian rifugi. Advance booking is essential in July and August.
• Guesthouses and B&Bs: Available in most of the 6 towns and larger villages on the route. Budget €50–90 per room per night in Carinthia and Friuli; €35–65 in rural Slovenia.
• Camping: Organised sites charge €8–15 per person per night. Wild camping is prohibited in Triglav National Park and restricted in Dobratsch Nature Park (Austria).
• Guided packages: As of 2026, Trail Angels GmbH (+43 4782 93093) offer luggage transfer and accommodation booking for the Carinthian sections via bookyourtrail.com.

Getting There & Back

As a loop, the JK02 starts and finishes in Carinthia, Austria. The main transport gateways are:

• Villach, Austria: Most practical basecamp for the start and finish. Direct trains from Vienna (3 h 30 min), Graz (2 hrs), Salzburg (2 h 30 min), and Venice (3 hrs). Klagenfurt Airport (KLU) is 30 km east, with Ryanair and Austrian Airlines connections.
• Klagenfurt, Austria: Klagenfurt Airport serves seasonal routes from London Stansted, Dublin, and Frankfurt. Train to Villach takes 25 minutes.
• Ljubljana, Slovenia: Jože Pučnik Airport links most major European hubs — useful for joining or exiting the route mid-circuit. Bled and Bohinj (Stages 7–9) are reachable within 1–2 hours by bus from Ljubljana.
• Udine / Trieste, Italy: Udine has direct trains from Venice (1 h 30 min) and Milan (3 hrs) — practical for hikers joining the Friuli section at Stages 12–24.

Permits & Fees

As of 2026, the JK02 requires no trail-specific permit or fee. Note the following area rules:

• Triglav National Park (Slovenia): No entry fee, but overnight camping within park boundaries requires a permit obtained at park visitor centres. Standard hut fees apply inside the park.
• Natura 2000 zones: Multiple sections cross EU Natura 2000 protected areas in all three countries. No individual permit required, but dogs must be kept on leads and off-trail camping is prohibited.
• Alpine Club membership: Membership of the Austrian Alpine Club (ÖAV) or Club Arc Alpin entitles hikers to reduced hut rates, typically €6–10 per night discount. Annual membership costs €55–70 depending on nationality and age category.
• Mountain rescue insurance: Rescue costs in Austria, Slovenia, and Italy can reach €5,000–15,000 without coverage. ÖAV or DAV membership includes mountain rescue; standalone alpine rescue policies from ÖAMTC or specialist providers cost €30–60 per year.

Gear & Packing List

The JK02’s 3 km of secured fixed-rope passages, 48 passes, and average stage length of 24 km call for gear that balances capability with weight discipline — every unnecessary kilogram is carried across 45,000 m of elevation gain. Experienced completers typically target a base pack weight of 8–12 kg.

Backpack (40–60 L): Load stability and hip-belt fit are non-negotiable for multi-week stages across mixed alpine terrain. The Deuter Aircontact Core 50+10 is a well-proven choice for the JK02’s variety of surfaces, with a ventilated back panel and substantial hip-belt padding for long days. Ultralight hikers committed to hut-to-hut travel should consider the Zpacks Arc Haul Ultra 60L, which delivers exceptional frame load transfer at under 800 g. For hikers prioritising ventilation on the warmer Italian stages, the Osprey Atmos AG 50 is a strong mid-weight option. Our roundup of the best ultralight backpacks of 2026 covers seven packs tested on alpine terrain, including several well-suited to routes of this length.

Key items for the JK02:

• Footwear: Full leather or synthetic mid-cut boots with a stiff midsole for scree descents and the via ferrata sections. Trail runners are viable for experienced hikers on non-technical stages but inadequate for the fixed-rope passages.
• Via ferrata set: A lightweight Y-lanyard harness kit (200–400 g) is required for the 3 km of fixed-rope passages. No climbing grades above UIAA I / ferrata difficulty B are encountered on the main route.
• Navigation: Download GPX tracks for all 30 stages before departure. Carry paper backup: ÖAV/Kompass 1:25,000 for Austria; PZS maps for Slovenia; Tabacco 1:25,000 for the Italian sections. Mobile signal is unreliable in the Carnic Prealps.
• Layering system: Conditions range from 30 °C in the Friulian valleys to sub-zero on exposed high passes. A merino base layer, mid-layer fleece, and taped-seam waterproof shell are non-negotiable. Always carry the shell regardless of morning conditions.
• Nutrition: The JK02’s daily elevation profiles put most hikers at 4,000–5,500 kcal per day. Our guide on how many calories you need hiking a full day is a useful reference for planning food supplements alongside hut-meal services. Carry 2–3 days of emergency food regardless of planned hut stops.

Frequently Asked Questions

How long does it take to hike the full JK02?
The official figure is 270 hours of net walking time across 30 stages, translating to approximately 40–50 hiking days when rest days and bad-weather delays are factored in. Fit, experienced hikers have completed the loop in 35 days; a relaxed pace with layover days runs 55–60 days. The Austrian and Slovenian sections have the densest hut infrastructure and suit faster itineraries.

Do I need technical climbing skills for the JK02?
The trail officially requires above-average physical conditioning, alpine experience, and self-sufficiency. The 3 km of fixed-rope passages are graded no higher than UIAA Grade I — equivalent to hands-on scrambling. A lightweight via ferrata Y-lanyard set is required. The JK02 is not suitable for beginners; completing several multi-day alpine routes beforehand is the appropriate minimum preparation.

Can I hike the JK02 in segments over multiple years?
Yes — the 30 stages are designed to be independently accessible, with public transport links at key endpoints including Villach, Bled, Tolmin, and Udine. The 68 alternative route variants allow shorter circuit options. Trail Angels GmbH can arrange luggage transfer and accommodation packages for hikers tackling the trail in multi-year segments.

What languages do I need along the JK02?
German is essential in Austria and useful in alpine huts across all three countries. Basic Slovenian helps in remoter villages; Italian is the primary language in Friuli-Venezia Giulia towns, though many hut keepers in the Carnic Alps speak German too. The language islands of Sauris and Sappada maintain distinct ancient German dialects. Carry an offline translation app as backup.

Is the JK02 suitable for solo hikers?
Many people hike it solo, but Stages 16–24 in the Italian Carnic Prealps are genuinely remote — mobile signal is patchy and mountain rescue response can exceed 90 minutes. Solo hikers should carry a PLB or satellite communicator, register nightly plans with hut keepers, and hold solid navigation and self-rescue skills. Trail Angels offers guided introductory stages for those wanting company on the first sections.