JK18

The JK18 Julius Kugy Alpine Trail is a 720 km circular loop connecting Austria (Carinthia), Slovenia and Italy (Friuli-Venezia Giulia) across 30 stages with 45,000 metres of cumulative elevation gain. Part of the International Walking Network (IWN), the route circles the Southern Alps from the Bertahütte trailhead in Carinthia through the Julian Alps and Carnic highlands, returning north via the Gailtaler Alps — typically completed in 35–45 days.

About the JK18

The trail honours Julius Kugy (1858–1944), a Triestine-Austrian alpinist, botanist and writer who spent decades exploring and documenting the Julian Alps. His pioneering ascents — including Jalovec, routes on Triglav’s north wall and dozens of unnamed peaks — remain referenced in alpine literature today. Milan Naprudnik conceptualized the three-country circuit in the 1990s; formal planning began in 2014, and in November 2023 Austria’s Federal Ministry for Labour and Economy officially designated the JK18 a “lighthouse project” in sustainable alpine tourism.

The route starts and finishes at the Bertahütte (1,525 m) in Carinthia, completing a clockwise circuit through three distinct mountain systems: the Karawanken, the Julian Alps and the Carnic Alps. The highest point is Dom Planika pod Triglavom at 2,401 m in Slovenia’s Triglav National Park; the lowest is 198 m at Idrsko in the Soča Valley — a 2,203 m altitudinal range spanning subalpine meadow, glacial karst, forested gorge and river valley within a single continuous route.

As of 2026, the JK18 is waymarked with tricolour logos combining Austrian red, Slovenian blue and Italian green. QR codes at major junctions link directly to stage-specific GPX files and hut booking contacts. The standard field reference is the Südalpen-Umrundung guidebook by Valentin Wulz (Rother Publishing, 2023 edition), available in German and English. The route passes through 6 cities and roughly 50 villages, with 17 mountain huts on the main circuit — expanding to 20 with the eight optional extensions and 67 variant routes that offer lower-ground alternatives when high ridges are in cloud.

Route Overview & Stages

The 30 official stages average 24 km and 1,500 m of ascent per day, placing the JK18 firmly in the experienced-alpine-hiker category. The table below groups the route into its six natural geographic sections, reflecting changes in terrain, culture and country.

Stage 1, at 34.1 km and 10 hours of official walking time, is the longest single day on the route. Stage 6 covers just 13.3 km but packs 920 m of ascent into the Kamnik-Savinja approach. The full 30-stage route totals 270 hours of walking time.

Highlights & Points of Interest

• Bertahütte and Wolayersee (E1 / E30) — The circular trailhead sits at 1,525 m above Villach in Carinthia. A peace sculpture unveiled on 29 June 2024 by sculptor Georg Planer stands at the nearby Wolayersee, on the Austrian–Italian border. The inscribed stone beside it reads “Blessed are the peacemakers” — the thematic anchor of a route connecting three nations.
• Logarska Valley (E5) — One of the best-preserved glacial trough valleys in the Eastern Alps, with an 838 m valley floor enclosed by walls rising above 2,000 m. Protected as a Slovenian landscape park since 1987, the valley is a dramatic entry point to the Kamnik-Savinja section and a strong candidate for a rest day.
• Dom Planika pod Triglavom — the 2,401 m high point (E10–E11) — The highest point on the JK18, operated by the Alpine Association of Slovenia with capacity for roughly 60 hikers. On clear mornings the Adriatic coastline is visible 100 km to the south. The final approach involves secured climbing passages on exposed limestone.
• Seven Triglav Lakes (E11) — The Koča pri Triglavskih jezerih hut (1,685 m) sits at the edge of a glacially carved plateau studded with seven high-altitude lakes. The landscape is the most celebrated glacial karst terrain in Slovenia and forms a core section of the 2026 guide to hiking in Slovenia.
• Kobarid / Caporetto — WWI history and Soča Valley (E13) — Stage 13 descends into Kobarid, where a highly regarded museum documents the 1917 Battle of Caporetto. The Soča River here runs an unmistakable aquamarine produced by suspended glacial flour. The stage ends at Rifugio Solarie — the first Italian overnight stop on the route.
• Sauris / Zahre — medieval linguistic enclave (E22) — At 1,400 m in the Carnic Alps, Sauris is a village where a Bavarian-Germanic dialect has survived for roughly 700 years amid Italian-speaking Friuli. UNESCO recognises it as a linguistic island. The JK18 passes through its characteristic timber alpine architecture before climbing to the Carnic highlands.
• Tolmezzo — main Italian resupply hub (E20) — At 330 m in the Tagliamento valley, Tolmezzo offers pharmacies, supermarkets, banks and regional rail to Udine (50 km, approximately 1 hour). The standard mid-route split point for hikers tackling the circuit across two separate trips.
• Karnische Kamm Border Ridge (E25–E26) — Roughly 40 km of ridge walking above 2,000 m along the Austrian–Italian border. South-facing views extend across the Friulian plain to the Adriatic; north-facing views drop into the Gailtal. One of the longest exposed high-ridge sections in the Eastern Alps and a defining memory for most JK18 thru-hikers.

Practical Information

Best Time to Hike

Mid-June to mid-September is the dependable hiking window. Snow on the Triglav stages (E10–E11) typically clears by mid-to-late June; the Kamnik-Savinja Alps (E5–E7) clear one to two weeks earlier. July and August are peak season — huts on Stages 9–13 book out 2–3 weeks in advance. September is the preferred month for experienced alpine hikers: daytime temperatures at altitude drop to 8–18 °C, crowds thin noticeably, and early autumn colour reaches valley forests by mid-month. Plan to finish all high-alpine stages before late September, when fresh snow above 2,000 m is probable.

2026 alert: the Nassfeld border crossing on the Italian side is closed for roadworks until 15 June 2026. Hikers beginning before that date should check the official JK18 website for current detour routes affecting Stages 25–26.

Accommodation

The 17 mountain huts on the main route are run by alpine associations in all three countries. Dormitory (Lager) rates run €20–40 per person; private rooms cost €45–65. Full board (Halbpension) at high-altitude huts is €55–75. Valley guesthouses in Tržič, Kobarid, Tolmezzo and Hermagor average €50–90 per night. Austrian huts list on alpenvereinaktiv.com; Slovenian huts typically require direct phone booking. Book 2–3 weeks ahead for July and August, especially Stages 10–12 in the Triglav zone. Alpine club memberships (Austrian ÖAV, Slovenian PZS, Italian CAI — from approximately €60/year) earn 30–50% hut discounts and pay for themselves within three nights.

Getting There & Back

As a closed loop, the JK18 is most conveniently accessed from Villach, Austria. Direct trains reach Vienna in 2.5 hours, Salzburg in 1.5 hours and Ljubljana in 1.5 hours. The nearest international airports are Klagenfurt (40 km east of Villach) and Ljubljana (80 km southeast). Regional buses from Villach reach Feistritz an der Gail, the closest village to the Bertahütte trailhead (8 km, covered by local taxi). Tolmezzo (Stage 20) connects to Udine by regional train and is the standard mid-circuit entry point for hikers splitting the route across two trips. Kobarid (Stage 13) is served by regular buses to Bovec and Nova Gorica.

Permits & Fees

No trail permit is required for the JK18. Austria, Slovenia and Italy are all Schengen countries — border crossings involve no documentation for EU/EEA citizens. Triglav National Park (Stages 10–12) has no entry fee as of 2026, though wild camping within park boundaries is strictly prohibited and enforced by park rangers. Hut fees are collected at check-in. The Wolayersee area falls within a protected nature reserve; lighting open fires is not permitted.

Gear & Packing List

The JK18 demands a full alpine kit to handle conditions ranging from 30 °C valley heat at 198 m to near-freezing wind chill above 2,400 m — often within a single stage. For a hut-to-hut approach with planned resupplies in Tolmezzo and one or two Slovenian valley towns, 35–45 litres of pack capacity is adequate.

Footwear is the most consequential decision on the JK18. The route combines 290 km of mountain trail, 160 km of gravel road and 3 km of secured climbing passages. The Salomon X Ultra 4 Mid GTX handles this range well: the GTX membrane survives morning dew and stream crossings on the Triglav approaches while the Contagrip sole grips the limestone and slate that dominate the Carnic Alps.

Navigation and communication warrant extra attention. Cell coverage drops to near-zero on Stages 5–12 and along the Karnische Kamm ridge. The Garmin inReach Mini 3 Plus provides two-way satellite messaging and SOS functionality across all three countries — essential on sections up to 15 km from the nearest road access. Download all stage GPX files before each leg begins.

Huts provide blankets but rarely sleeping bags. A lightweight quilt bridges the gap without eating into your weight budget: the Zpacks Solo Quilt 20F weighs 283 g and handles Alpine overnight lows reliably down to −6 °C. The weight saving relative to a full mummy bag matters across a 35+ day route.

Temperature swings of 15–20 °C between valley floor and ridge are routine. A reliable mid layer — such as the Patagonia R1 Fleece Jacket — covers the gap between shirt and hard shell without adding significant volume. Trekking poles are equally important: with 45,000 m of total elevation gain matched by equivalent descent, the Black Diamond Distance Carbon Z 110 cm folds to 35 cm for hut storage and technical scrambling sections, protecting knees across the full circuit.

For calorie planning across a multi-week route, the guide to daily hiking calorie needs covers how pack weight and gradient affect energy demands — directly relevant on remote stages where the only food source is a hut kitchen. If cutting base weight before departure, the 2026 ultralight backpack comparison covers seven packs tested across multi-week Alpine itineraries. Hikers new to extended mountain travel will find the fastpacking training guide useful for calibrating fitness 8–12 weeks before the start date.

Frequently Asked Questions

How long does it take to hike the Julius Kugy Alpine Trail?

Most thru-hikers complete the 720 km, 30-stage route in 35–45 days, averaging 7–8 hours of walking per day against 270 total official hiking hours. Rest days in Tolmezzo, Kobarid and Villach are strongly advised. Completing the circuit in fewer than 30 consecutive days is possible but leaves little time for the cultural stops — Kobarid’s WWI museum, Logarska Valley, Sauris — that define the JK18’s character.

Is the Julius Kugy Alpine Trail suitable for beginners?

No. The JK18 requires above-average fitness, experience with exposed alpine terrain and independent navigation ability. Stages E10–E12 in Triglav National Park involve secured climbing passages and route-finding on glacial karst at up to 2,401 m. A sensible starting point is a 5–7 day section — such as the Kamnik-Savinja stages — before committing to the full circuit.

Where does the Julius Kugy Alpine Trail start and end?

The JK18 is a closed loop starting and finishing at the Bertahütte (1,525 m) near Villach, Austrian Carinthia. Because it is circular, hikers can enter at any accessible transport hub — Tolmezzo (Stage 20), Kobarid (Stage 13) and Mojstrana (Stage 9) are the most commonly used alternative entry points with practical public transport connections.

What is the hardest stage on the JK18?

Stage 5 — Koča na Loki to Kamniška koča — climbs 2,140 m over 23.9 km through the Kamnik-Savinja Alps and is widely rated the most demanding single day. Stage 1 (34.1 km, 10 hours) is the longest by distance. The most technically exposed terrain is the approach to Dom Planika pod Triglavom (2,401 m) on the Triglav stages (E10–E11).

Can I hike the JK18 in stages across multiple years?

Yes — the loop structure and transport connections at Kobarid (Stage 13), Tolmezzo (Stage 20) and Villach (trailhead) make staged completion easy to plan. The Slovenian section, covering Stages 4–13 through the Julian Alps, is frequently hiked as a standalone 10-stage itinerary that includes Triglav National Park and the turquoise Soča Valley.