Several million years ago, the Ain was lost underground, in a labyrinth of cavities, an underground gallery called "losses". Over time, the work of water erosion has done its work, and has nibbled the limestone and destroyed the vault of the underground gallery. It remains today a unique natural site where water makes its way between rocky piles and stone remains.

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Paul_C

March 30, 2023

Hiking

A marked and laid out path allows you to follow the bubbling Ain river along narrow and deep gorges, rocks and waterfalls, all surrounded by forest.

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JJPIT

August 17, 2023

Hiking

A short walk through the footbridges and belvederes that line the Ain after its departure, magnificent scenery

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Best routes to Pertes de l'Ain

4.5

(41)

179

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1. The losses of the Ain and the castle Villain — loop

6.81km

02:10

280m

270m

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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Moderate

4.6

(35)

255

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2. Pertes de l'Ain – Waterfall loop from Bourg-de-Sirod

4.94km

01:28

150m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

4.4

(12)

119

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3. Waterfall – Pertes de l'Ain loop from Bourg-de-Sirod

1.93km

00:35

60m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

Details

Informations

Elevation 630 m

Weather

Wednesday 11 February

7°C

3°C

-- %

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Location: Bourg-De-Sirod, Lons-Le-Saunier, Bourgogne-Franche-Comté, France

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Pertes de l'Ain

1. The losses of the Ain and the castle Villain — loop

2. Pertes de l'Ain – Waterfall loop from Bourg-de-Sirod

3. Waterfall – Pertes de l'Ain loop from Bourg-de-Sirod

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