Lago Ritom to Piora Valley

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Lago Ritom to Piora Valley: Ticino’s High-Lake Walk

Published 17 July 2025 Updated 5 June 2026

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Ranked #499 of 974

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HikeList Score

Lago Ritom to Piora Valley scored 80/100 on HikeList's trail-quality metrics.

Very Good

See score breakdownHide breakdown

Ideal length 55
Balanced challenge 100
Scenery & wildness 98
Varied terrain 71
Accommodation 67
Food & support 72
Path quality 98
Season flexibility 76

Computed from length, challenge, scenery & wildness, terrain variety, accommodation, food & support, path quality and season flexibility.

Lago Ritom to Piora Valley is an 8.5 km, 1-day alpine walk in Val Piora, Leventina, Canton Ticino, Switzerland. Most hikers take the Ritom funicular from Piotta to Lago Ritom, then follow waymarked Swiss hiking paths and gravel tracks past Lago di Tom and Lago Cadagno. It is best treated as a moderate half- to full-day route: gradients are mostly gentle, but the altitude, rocky sections and fast-changing mountain weather deserve respect.

Route Overview

Start at the Lago Ritom dam / Ritom funicular upper station, reached from Piotta in the Leventina valley. From there the classic line heads east and north into the Piora Valley, using well-trodden alpine paths and gravel service tracks beside Lago Ritom, then onward towards Lago di Tom, Lago Cadagno, the Alpe Piora dairy and the Centre for Alpine Biology near Capanna Cadagno. The described route is point-to-point through the valley, though signed loop variants around Lago Ritom and Lago Cadagno are also used. For another short Ticino mountain option, compare the Cardada Cimetta Panorama Trail; for a bigger Swiss objective, see the Alpine Pass Route.

Transhumance, Hydropower and Alpine Science

The Piora Valley has long been shaped by summer transhumance, with cattle grazing the high pastures that produce Piora alpine cheese. In 1917, Lago Ritom was dammed as a hydro reservoir to generate power for the Gotthard railway’s Piotta power station. The Ritom funicular was built for that same project and opened to the public in 1921. Since 1994, the Centre for Alpine Biology has made the valley a research site focused especially on Lake Cadagno.

Notable highlights

Lago Ritom: The largest lake in the valley and an early-20th-century reservoir near the trailhead. Its blue-green water and dam give the walk an immediate alpine-lake setting.

Ritom funicular: A famously steep public funicular from Piotta, with a maximum gradient of 87.8% and a 785 m vertical rise. It was built in 1917 for the dam works and is the usual access to the start.

Lago di Tom (2,022 m): The highest lake on the standard route and the approximate high point of the walk. It sits in open pasture beneath the surrounding ridges.

Lago Cadagno (1,921 m): A rare meromictic lake whose layers do not fully mix. Its unusual chemistry supports purple sulphur bacteria and makes it important for alpine research.

Alpe Piora dairy and Centre for Alpine Biology: High summer pastures produce prized Piora alpine cheese, while the nearby research station studies Lake Cadagno from restored Alpe Piora buildings.

Wildlife and flora: Summer meadows bring wildflowers, and marmots and chamois are present in the wider valley.

Challenges to expect

This is a short route, but it is still an alpine walk. Expect gravel roads, dirt paths, rocky and uneven sections, and exposed high-valley weather. Navigation is helped by Swiss waymarking and SwitzerlandMobility signage, but variants around the lakes can change distance and time. Check the Ritom funicular operating season, carry layers, and do not treat the paid funicular as a trail permit or fee.

499

Ranked #499 of 974

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