JK01

The JK01 — Julius Kugy Alpine Trail — is a 720 km circular long-distance hiking route across the Southern Alps, looping through Austria, Slovenia, and Italy in 30 stages with 45,000 metres of cumulative ascent, 52 mountain passes, and a highest point of 2,401 metres. Inaugurated on 29 June 2024, it is one of the world's most significant routes on the International Walking Network (IWN).

About the JK01

The Julius Kugy Alpine Trail (JK01) is one of Europe's newest and most ambitious long-distance hiking circuits, officially inaugurated on 29 June 2024 with the unveiling of a peace sculpture at Wolayer Lake (1,967 m) on the Austrian–Italian border. Classified within the International Walking Network (IWN), the trail forms a complete loop through three nations, beginning and ending at Bertahütte (1,525 m) in Carinthia, Austria. As of 2026, it stands as one of the most compelling mountain circuits in the Eastern Alps.

The trail honours Julius Kugy (1858–1944), the pioneering Slovenian-Austrian alpinist, botanist, and author who spent decades exploring and documenting the Julian Alps. His spirit of cross-border adventure defines the route: the JK01 is jointly operated by alpine clubs from Carinthia (Austria), Slovenia, and Friuli-Venezia Giulia (Italy) — a tri-national friendship initiative conceived by Milan Naprudnik (1927–2021) around 2004, formalised under its current name in 2014, after being developed under the working title "Alpe Adria Alpine Tour."

In November 2023, the Austrian Federal Ministry of Labour and Economics selected the JK01 as one of eight flagship projects supporting resilient mountain tourism. Trail Angels GmbH was appointed project facilitator in December 2023, overseeing the expansion to 30 main stages, 8 extension routes (approximately 175 km), and 69 connecting routes (approximately 1,225 km) — giving ambitious hikers access to over 2,120 km of waymarked mountain terrain in total. The main circuit alone covers 720 km with 44,000–45,000 metres of elevation gain and an estimated 270 hours of walking time.

The JK01 interconnects with several major European long-distance paths: the Via Alpina, Sentiero Italia, Alpe Adria Trail, Südalpenweg (03), and Slovenska planinska pot (01). Its circular design lets hikers begin from multiple gateway towns — Villach-Warmbad, Kobarid, Tolmezzo, or Prato Carnico — making logistics far more flexible than a conventional point-to-point trail. If you are planning other Balkan alpine adventures alongside this route, the guide to hiking the Theth to Valbona Trail in Albania covers another classic multi-day mountain crossing in the region.

Route Overview & Stages

The 30 main stages are organised into eight geographic sections. Most hikers complete one stage per day. Total elevation gain averages around 1,500 m per stage, with several demanding sections reaching 2,000 m of ascent in a single day. The table below outlines each section, its stage range, and primary terrain or landmark.

Stage 11 in Triglav National Park — climbing to Dom Planika at 2,401 m — and Stage 26 in the Gailtaler Alps (Reißkofel, 2,347 m) are rated the most technically demanding. Stage 28 carries the official classification sehr schwer (very difficult). Most hikers completing the full circuit budget between 35 and 45 days depending on fitness and rest-day frequency. The route's lowest point sits at just 198 m in the valley approaches of Friuli-Venezia Giulia, illustrating the dramatic elevation range across all 30 stages.

Highlights & Points of Interest

• Triglav National Park (Stages 10–13): Slovenia's only national park covers 839 km² of alpine terrain centred on the 2,864 m Triglav massif. The JK01 climbs to Dom Planika refuge at 2,401 m — the circuit's highest point — through a landscape of glacial lakes, limestone karst, and endemic flora. Crowds peak in July and August; hut bookings are essential at least 3–4 days ahead.
• Wolayer Lake (1,967 m): A pristine alpine lake straddling the Austrian–Italian border, set within a protected nature reserve. The peace sculpture unveiled here on 29 June 2024 marks the trail's official inauguration point and symbolises the three-country friendship at the heart of the JK01.
• Reißkofel (2,347 m): The defining peak of the Gailtaler Alps section (Stage 26) — a demanding ascent rewarded with sweeping views across southern Carinthia and northern Italy. This stage is rated among the most strenuous on the entire circuit.
• Storžič Peak (2,132 m): Encountered on Stage 7 through the Kamniško-Savinjske Alps, Storžič is one of Slovenia's most recognisable summit profiles, visible across hundreds of kilometres of the Slovenian lowlands on clear days.
• Pesariis — Watchmakers' Village: This living open-air museum in the Carnian Prealps has produced clocks and watches for centuries. Multiple giant sundials and an outdoor clock museum line the village streets — a remarkable cultural counterpoint to the surrounding alpine terrain on Stage 21.
• Kolovrat Freedom Museums (Pot Miru): A series of WWI and WWII memorial sites along the Italian–Slovenian ridgeline, including the historic Path of Peace (Pot Miru). The route passes through preserved trench systems and frontier fortifications — among the most poignant sections of the entire JK01.
• Matajur (1,642 m): The centrepiece summit of Stage 15 in the Julian Prealps commands a 360° panorama over the Julian Alps, the Friulian plain, and — on the clearest days — the Adriatic coast some 80 km to the south.
• Bertahütte (1,525 m): The circuit's start and end point in Carinthia, this staffed mountain hut in the Gailtal Alps serves as the symbolic gateway to the JK01. Starting here places you immediately in the alpine environment that defines the entire route.

Practical Information

Best Time to Hike

The JK01 is a high-alpine route with several stages regularly above 2,000 m. The reliable window for hiking the full circuit in safe, snow-free conditions runs from late June to mid-September. July and August offer the most stable weather and the longest daylight hours — up to 15 hours in July in southern Austria — but also the highest hut occupancy on popular stages in Triglav National Park.

Early June typically sees residual snowfields on north-facing slopes above 1,800 m, particularly in the Triglav and Kamniško-Savinjske sections. Late September brings shorter days, cooling overnight temperatures (often near 0 °C above 2,000 m), and an increasing risk of early snowfall on the highest passes. Afternoon thunderstorms are frequent throughout July and August across all three countries — plan to complete exposed ridge sections before noon where possible. As of 2026, the lower Italian and Slovenian stages remain walkable well into October.

Accommodation

The JK01 connects approximately 17–20 mountain huts and 50 villages, with accommodation options varying significantly by country:

• Austria (Carinthia): Staffed alpine huts (Schutzhütten) charge €20–€35 per night for a dormitory bunk or €40–€65 for a double room, usually with breakfast included. The Klagenfurter Hütte and Bertahütte are reliable fixtures anchoring Stages 1–4 and 26–30.
• Slovenia: Mountain huts (koče/planinski dom) typically charge €15–€30 per night for a dorm bed. Triglav National Park huts fill fastest — Dom Planika (2,401 m) in particular. Members of affiliated alpine clubs (Austrian ÖAV, German DAV, Slovenian PZS) receive 30–50% discounts at partner huts.
• Italy (Friuli-Venezia Giulia): Rifugios charge €25–€45 per night on the high mountain stages, often including half-board (demi-pension). Village guesthouses (affittacamere) in towns such as Pesariis and Sauris run €50–€80 per room. Camping is available in several valleys between the Italian stages.

Budget approximately €30–€50 per person per day for accommodation and meals when staying in mountain huts, or €20–€35 per day if carrying a tent for valley camping on the lower sections.

Getting There & Back

The circuit's primary air gateway is Klagenfurt (KLU), Carinthia's regional airport, with connections to Vienna (45 min), Frankfurt, and Zürich. From Klagenfurt, regional trains and buses cover the 45 km to the Gailtal valley and onward to the Bertahütte trailhead area. Villach is the nearest major rail hub on the ÖBB network — hourly trains link Villach to Klagenfurt (20 minutes) and intercity services connect to Venice (2.5 hours) and Ljubljana (1.5 hours).

For the Italian Friuli section, Tolmezzo is accessible by bus from Udine (FS rail station, approximately 50 minutes), connecting to regional Trenitalia services. For a Slovenian starting option, Kobarid is served by buses from Bovec or Nova Gorica. Because the JK01 is a circuit, you return to the same trailhead, eliminating the logistical challenge of a one-way shuttle.

Permits & Fees

No permit is required to hike the JK01 main route as of 2026. Triglav National Park (Stages 10–13) prohibits wild camping outside designated areas, and a small environmental levy (approximately €5 per night) applies at some park-adjacent huts. The trail itself is free to use. Official GPX files for all 30 stages and their extensions are available via the trail's website (julius-kugy-alpine-trail.com) and associated app. Alpine club membership (ÖAV, PZS, CAI) is not required but delivers meaningful hut discounts across all three countries — worthwhile for a 40-day circuit.

Gear & Packing List

A 720 km alpine circuit with 45,000 metres of cumulative ascent demands a pack that balances carrying capacity with weight discipline. For most hikers completing all 30 stages over 35–45 days, a 50–65 litre pack is the practical sweet spot — large enough for 2–3 day food carries between resupply villages, compact enough not to become a liability on the exposed scrambling sections. The Zpacks Arc Haul Ultra 60L weighs under 700 g and provides structured carry for loads up to 15 kg, making it one of the most capable ultralight options for a long Alpine circuit. For hikers who prefer a more traditional framed carry with heavier loads, the Deuter Aircontact Core 50+10 provides excellent back ventilation and load transfer across the extended Austrian hut sections. If you prefer to keep base weight low and resupply frequently in villages, the Fjällräven Abisko Hike 35 suits fast-and-light hikers on the shorter Italian stages. For a broader comparison of options see our guide to the best ultralight backpacks of 2026.

Beyond the pack, essential items for the JK01 include:

• Footwear: Mid-cut waterproof hiking boots with crampon compatibility for early June snowfields above 2,000 m on the Triglav and Gailtaler sections.
• Layers: Down or synthetic insulation jacket, waterproof hardshell, merino base layers — temperatures above 2,000 m regularly drop to 0 °C or below even in July.
• Navigation: Offline GPS app loaded with JK01 waypoints plus paper topo maps (1:25,000) for the Triglav and Gailtaler sections where mobile signal is limited.
• Trekking poles: Essential with alpine baskets — the 1,500–2,000 m descent stages put significant strain on knees over a multi-week circuit.
• Nutrition planning: Budget for 1–2 day self-sufficient food carries between villages on remote Italian and Slovenian sections. Daily calorie needs on full hiking days typically run 3,500–5,000 kcal depending on body weight and daily ascent.
• First aid & emergency: A comprehensive kit including blister treatment, emergency bivouac sack, and alpine rescue insurance valid across Austria, Slovenia, and Italy.
• Water treatment: Reliable filtration — most mountain springs along the JK01 are safe, but Triglav National Park regulations require care around designated water sources.

Frequently Asked Questions

How long does it take to complete the full JK01?

Most hikers complete the 720 km main circuit in 35–45 days, averaging one stage per day. The 30 official stages vary from around 15 km to over 30 km, with 1,000–2,000 m of ascent per stage. Fit hikers with prior multi-week alpine experience may finish in 30 days; those combining cultural visits and rest days typically take 40–50 days. The official estimate is 270 hours of walking time.

Do you need technical climbing skills to hike the JK01?

The vast majority of the JK01 is a waymarked hiking route requiring no ropes or technical climbing gear. Stage 11 in Triglav National Park and Stage 28 in the Gailtaler Alps are rated sehr schwer (very difficult) and involve exposed scrambling on fixed chains and cables — similar to a moderate via ferrata. Solid experience on exposed mountain terrain and a reliable head for heights is strongly recommended before attempting the full circuit.

Can the JK01 be hiked in sections over multiple trips?

The circular design is specifically engineered for sectional hiking. The route passes through or near several transport hubs — Villach-Warmbad, Kobarid, Tolmezzo, and Prato Carnico — making it practical to complete one or two sections per visit and return by bus or train. Many hikers tackle the Austrian and Slovenian sections one season and the Italian Carnian and Julian sections the following year.

What languages are useful on the JK01?

The trail crosses three countries and three primary languages: German in Carinthia, Slovenian in Slovenia, and Italian in Friuli-Venezia Giulia. In practice, hut staff across all three countries typically speak some English, especially at frequently visited refuges. Trail signage uses a trilingual logo system with QR codes. Basic phrases in German, Slovenian, and Italian smooth interactions in smaller villages and more remote huts considerably.

Is the JK01 suitable for solo hikers?

Yes — the JK01 is regularly completed solo as of 2026. The route is well-waymarked with the Kugy trilingual logo and stage-junction QR codes. Mobile signal is available in most valleys and at established huts. Mountain rescue services operate across all three countries. Solo hikers should always sign in at hut registers, carry emergency communication, and check current conditions before attempting the highest stages in the Triglav and Gailtaler sections during unsettled weather.