La Senda de Camille is a circular trekking route that explores the stunning valleys of the Western Valleys Natural Park in Aragón, Spain, and the Pyrenees National Park in the French department of Pyrénées-Atlantiques.
This trail is named after Camille, the last native Pyrenean bear, declared extinct in 2020 at the age of twenty-five, when no more traces were found. The route passes through the natural habitat where Camille spent its final years.
The trek offers a unique opportunity to experience both the southern and northern slopes of the Pyrenees, crossing mid-mountain terrain filled with pine and beech forests and alpine meadows. The moderate mountain passes will take you from one valley to the next, revealing spectacular, peaceful landscapes that radiate calm.
However, this trek is not for everyone, as the accumulated elevation changes can be demanding. Nearly every day includes over 1,000 meters of ascent and descent, so prior trekking experience and good physical condition are required.
This translation is crafted to appeal to adventurous and nature-loving hikers looking for authentic mountain experiences in the Pyrenees.

About this Experience

Requirements

•    Good physical condition is essential as the trek involves 6-7 hours of walking daily with significant elevation gain and loss (around 1,000 meters each day).
    •    Prior mountain trekking experience is strongly recommended to handle varied terrain and altitude changes.
    •    Ability to carry a backpack with necessary gear for multi-day hiking, ideally keeping rucksack weight under 10 kg.
    •    Proper mountain equipment such as sturdy hiking boots, walking trousers, thermal layers, waterproof jacket, fleece, hat, and sun protection.
    •    Group size is typically small (1 to 12 people), suitable for guided or self-guided trekking.
    •    Willingness to hike in diverse mountain environments including forests, alpine meadows, and high passes in the Pyrenees.
    •    Some stages may require good stamina due to long daily distances up to 23 km and demanding ascents.
This trek suits hikers who are fit and prepared for a challenging mountain itinerary with rewarding natural landscapes

Data sheet

•    Total distance: approximately 104 km
    •    Duration: 7 days of hiking (6-stage variation also possible)
    •    Daily elevation gain and loss: around +1,000 to +1,200 m each day
    •    Daily hiking time: about 6 to 7 hours per stage
    •    Difficulty: challenging; recommended for hikers with good fitness and mountain trekking experience
    •    Terrain: circular route crossing mid-mountain terrain with pine and beech forests, alpine meadows, and moderate mountain passes between Aragón (Spain) and Pyrénées-Atlantiques (France)
    •    Accommodation: mountain refuges and hostels along the route
    •    Optional summits: Bisaurín (highest peak in the area), Petrachema, Castillo d’Acher, and Acué

Castillo d'Acher, in the Aragonese Pyrenees
Senda de Camille
Senda de Camille

What Our Guides Say

Cesc Claramunt
The Senda de Camille is a magnificent and demanding trek that truly captures the wild beauty of the Western Pyrenees. Walking these trails, you feel deeply connected to the mountains, forests, and valleys that shaped the last native Pyrenean bear’s home. Each day brings new landscapes, challenging ascents, and rewarding views that make the effort worthwhile. It’s a journey that tests your endurance but offers unforgettable moments of solitude, nature, and reflection. For any mountain lover, this is a truly special adventure.
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