Achensee is Tyrol's largest lake, stretching between the Karwendel and Rofan (Brandenberg Alps) ranges and nicknamed the "Fjord of the Alps" and the "Tyrolean Sea." At roughly 929 m elevation, 9.4 km long and up to 133 m deep, it is famous for near-drinking-quality turquoise water, historic lake steamers and a steam cog railway. As of July 2026 it is high season: the passenger boats (early May to early November) and the Achenseebahn, Europe's oldest exclusively steam-powered cog railway (2026 season opened 1 May), are both running normally. A hub for hiking, cycling, windsurfing and sailing, it rewards an unhurried stay of a few days walking the shoreline and returning by boat.
Achenseeschifffahrt lake cruises: three ships (MS Achensee, Stadt Innsbruck, Tirol) link six landings including Pertisau, Seespitz, Buchau, Gaisalm and Scholastika, on hop-on-hop-off routes plus the culinary 'Genusslinie' cruise
Achenseebahn: opened 1889, Europe's oldest steam-only rack railway, climbing from Jenbach up to the lake — a living piece of industrial heritage
Gaisalm: a lakeside alpine hut and restaurant reachable only on foot or by boat; the classic outing walks the shore path from Pertisau and returns by ship
Rofan cable car (Maurach) and Rofan ridge: ride up for sweeping views over the turquoise lake and the Karwendel/Rofan panorama (with activities such as the Airrofan skyglider)
Karwendel Nature Park and the water itself: one of Europe's largest protected areas, with near-drinking-quality water (visibility ~10 m) for hiking, cycling, windsurfing, sailing and diving
Good to know
SeasonAs an alpine lake, the water stays cold — generally below 20°C even in midsummer. Keep swims short and wear a wetsuit for windsurfing or diving. Boats run roughly early May to early November and the steam railway mainly May to October.
SeasonJuly and August are peak season. Book accommodation and popular cruise/steam-railway seats in advance. Afternoon showers and thunderstorms are common in the mountains, so plan outings for the morning.
RulesCollect the free guest card (AchenseeCard) at check-in. It gives free local buses, guided hikes and 10% off boats and the Rofan cable car among other perks, saving on transport and fares (valid 1 May–1 November 2026).
SafetyParts of the shoreline trails, such as Pertisau to Gaisalm, are narrow and run along exposed cliffs. Bring proper hiking shoes, water and a layer for changing weather, and watch for fast-shifting mountain conditions.
MannersIn the Karwendel Nature Park, stay on marked paths and carry your litter out. Do not disturb grazing cattle, and always close alpine-pasture gates behind you — standard courtesy in the mountains here.
CautionBuy tickets only at the official Achenseebahn and boat counters or their websites. Prices and timetables in older listings change often, so confirm the current amount before paying and be wary of unofficial resellers or cash-only demands.
Practical info
Arrive at Jenbach station (on the Innsbruck–Munich/Kufstein rail line), then continue up to the lakeside villages of Maurach, Pertisau or Achenkirch by the Achenseebahn steam railway or Postbus. Boats operate roughly early May to early November and the steam railway mainly May to October; the guest card makes local buses free. Confirm exact timetables, fares and closure days on the official sites for the latest details.
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