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Hiking trails & Routes
Italy
Aosta Valley
Arvier

Alta Via n. 2 della Valle d'Aosta - Tappa 4

Routes
Hiking trails & Routes
Italy
Aosta Valley
Arvier

Alta Via n. 2 della Valle d'Aosta - Tappa 4

Hard

13

hikers

Alta Via n. 2 della Valle d'Aosta - Tappa 4

10:08

21.8km

2,090m

Hiking

The Ascent to Lake Fondo and Zappelli bivouac is a difficult 13.6-mile high-altitude hike offering spectacular alpine scenery and access to

Last updated: February 26, 2026

Tips

Includes segments that may be dangerous

Parts of this route comprise highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.

After 4.90 km for 4.00 km

After 13.0 km for 4.00 km

Waypoints

A

Start point

Parking

Get Directions

1

5.21 km

Lago di Fondo

Highlight • Lake

From Lake Fondo you have a beautiful view of the Rutor massif. The perfect destination for an excursion or the ideal stop for a break, if you follow the Alta Via 2.

Translated by Google •

Tip by

2

10.7 km

Cosimo Zappelli Bivouac

Highlight • Mountain Hut

This bivouac is newly built, dates back to 2021, and is named after the mountaineer Cosimo Zappelli. He was a mountain guide and ski instructor. He roped up with Walter Bonatti and edited books on Mont Blanc. He also participated in expeditions to Iran, Africa, the Caucasus and the Andes. There are 10 beds.

Translated by Google •

Tip by

B

21.8 km

End point

Parking

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Way Types & Surfaces

Way Types

11.6 km

7.99 km

2.28 km

Surfaces

11.4 km

8.09 km

2.28 km

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (2,770 m)

Lowest point (1,550 m)

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Weather

Powered by Foreca

Wednesday 29 July

26°C

12°C

0 %

Additional weather tips

Max wind speed: 11.0 km/h

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Frequently Asked Questions

How difficult is the Ascent to Lake Fondo and Zappelli bivouac trail?

This is a very challenging high-altitude hike, classified as 'difficult' on komoot. It requires very good fitness, sure-footedness, and alpine experience. The terrain includes rocky paths, roots, steep drops, and some sections that are slightly exposed with safety ropes. It aligns with approximately SAC 4-6 on the Swiss Alpine Club (SAC) Hiking Scale.

How long does it typically take to complete this hike?

The Ascent to Lake Fondo and Zappelli bivouac trail is a long and demanding route. It covers over 21 kilometers with significant elevation changes, so it typically takes over 10 hours to complete.

What are the main points of interest along the route?

The trail offers breathtaking alpine vistas. Key features include the serene Lago di Fondo and the modern Cosimo Zappelli Bivouac. From the bivouac, you'll get splendid views of the Rutor area, the Paramont, the central valley, Lake Lenteney, and the majestic Mont Blanc range.

Is the Cosimo Zappelli Bivouac open to the public, and what facilities does it offer?

Yes, the Cosimo Zappelli Bivouac is a modern, well-equipped shelter built in 2021. It offers 10 beds with mattresses and blankets, a kitchenette (though you need to bring your own cooking gear), a dining area, captured water, and LED lighting powered by solar panels. It's a crucial stop on the Alta Via 2 route.

What is the best time of year to hike to Lake Fondo and Zappelli bivouac?

Given its high-altitude and challenging nature, the best time to hike this trail is typically during the summer months, from late June to early September, when snow has melted and weather conditions are generally more stable. Always check current weather and trail conditions before you go.

Do I need any permits or need to pay an entrance fee for this hike?

Generally, no specific permits or entrance fees are required for hiking this trail or accessing the Cosimo Zappelli Bivouac. However, it's always wise to check local regulations before your trip, especially if planning an overnight stay in the bivouac.

Is the Ascent to Lake Fondo and Zappelli bivouac trail dog-friendly?

While specific regulations for this exact trail are not detailed, high-altitude alpine trails often have restrictions or recommendations regarding dogs, especially due to wildlife protection and challenging terrain. If you plan to bring a dog, ensure it is accustomed to difficult, rocky, and potentially exposed sections, and always keep it on a leash. Check local park or regional guidelines for any specific rules.

Where can I park and what is the trailhead for this route?

The trail typically starts from the Chabodey area near La Thuile. Parking options would be available in this vicinity. It's recommended to research specific parking areas and trailhead access points closer to your travel date, as conditions and availability can change.

Does this trail connect with other well-known hiking routes?

Yes, this route is part of the broader Alta Via network. It fully covers sections of the Alta Via n. 2 della Valle d'Aosta - Tappa 4 and Sentiero Italia - Tappa F04. It also intersects briefly with the Via Alpina Red R118, Baulin - Alpage du Glacier, Runaz - Alpage du Glacier, Alta Via n. 2 della Valle d'Aosta - Tappa 5, and Sentiero Italia - Tappa F03.

What kind of gear should I bring for this challenging hike?

Given the trail's difficulty and high-alpine environment, you should bring appropriate gear for a multi-hour, strenuous hike. This includes sturdy hiking boots with good ankle support, weather-appropriate layers (even in summer), a headlamp, sufficient water and food, navigation tools, and a first-aid kit. If planning to stay at the Cosimo Zappelli Bivouac, remember to bring your own cooking gear.

Are there any public transport options to reach the trailhead?

While specific public transport details for the immediate trailhead are not provided, the Aosta Valley region generally has some public transport services. It's advisable to research bus routes or shuttle services operating from nearby towns like La Thuile or Aosta that might connect to the Chabodey area or other common starting points for this trail.

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