Plizio Visual Lab

Piz Terri South

Plizio editorial teamUpdated: Jun 2026Data Sources

peak

Weather…

Piz Terri South is a prominent peak in the Glarus Alps, located in the canton of Graubünden, Switzerland. Rising to 3,149 meters above sea level, it features spectacular views of the Rhine source region and surrounding mountain ranges. Geologically, the mountain consists mainly of granite and gneiss, formed during the Alpine orogeny. The southern flank features steep rock walls and deep gorges, while the summit ridge is narrow and exposed. Piz Terri is a popular destination for experienced mountaineers, who typically ascend via the normal route from the Terri Hut. The area is rich in alpine flora and fauna, including ibex and marmots. Historically, the peak was first climbed in 1865 by English alpinists.

Location: Switzerland
Top sights: Muot la Greina · Piz las Palas · Piz Miezdi
Nearby: Vals (12 km)

Best time to visit & climate

The most pleasant time to visit is Jun–Aug.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	-8	-8	-4	1	6	11	12	12	8	4	-2	-7
Rain mm	74	66	87	111	162	163	156	181	120	122	133	89

📋 Practical info

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Getting there

The south summit of Piz Terri is best accessible from the Valle di Blenio in Ticino, often via the Lago di Luzzone. Access to the reservoir is via Olivone and along steep, winding mountain roads.

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Best season

Visits are especially advisable from July to September, as the south-facing ascents are then mostly dry. However, after heavy rains, the paths on the flanks can be slippery and quite difficult.

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Terrain & paths

The terrain at the south summit is characterized by rugged rocks and steep scree fields that require alpine skill. The path is often narrow and runs partly through exposed, rocky terrain and steep slopes.

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What to bring

Hikers need grippy mountain boots, weather protection clothing, and enough drinking supplies for the sunny southern slope. A helmet can be sensible in rocky passages for protection against loose stones.

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Parking

Parking spaces are found at Lago di Luzzone or in Olivone, with the reservoir significantly shortening the ascent. In high season, spots at the lake can be limited, so an early start is highly recommended.

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Safety

The heat on the south side can be intense in summer, so you should ensure you have adequate sun protection. Additionally, stay on marked trails to avoid the risks of falling in steep, unmarked terrain.

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Time needed

From Lago di Luzzone, an ascent of the south summit usually takes about six to seven hours. The path is strenuous and requires a good distribution of energy for the subsequent descent to the base.