Col du Gerbier de Jonc – Mount Gerbier de Jonc loop from Bourlatier

Hiking trails & Routes

Col du Gerbier de Jonc – Mount Gerbier de Jonc loop from Bourlatier

Hard

4.3

(4)

hikers

Col du Gerbier de Jonc – Mount Gerbier de Jonc loop from Bourlatier

03:40

12.4km

250m

Hiking

Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is right next to a parking lot.

Last updated: August 1, 2026

Tips

Includes a segment that may be dangerous

A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.

After 3.79 km for 916 m

Waypoints

Start point

Parking

Get Directions

2.86 km

Source de Loire

Highlight • River

The official source of the Loire is Mont Gerbier-de-Jonc. This is the "true" source ...
Incidentally, each of the two sources also has its own restaurant 😃

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3.39 km

Col du Gerbier de Jonc

Highlight • Mountain Pass

The Col du Gerbier de Jonc from Saint-Martin-de-Valamas is 22.9 km long with a total drop of 885 m. The average gradient is 3.8% with maximum gradients of 8.3%.

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4.06 km

Like many peaks in this region, Mont Gerbier-de-Jonc is of volcanic origin. There is a one-way climbing ascent and a descent. This is also necessary because, when the weather is good, there is a lot going on here on weekends or during the holidays and "climbers" of all ages make their way to the summit.
At the height of the mountain lies an important watershed: the official source of the Loire is located here, and not far away rises the Ardèche, which winds its way through the department of the same name towards the Rhône.

Even if there is a lot going on here, the climb is worth it and is also recommended with children.

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4.71 km

Mount Gerbier de Jonc

Highlight • Summit

Mont Gerber de Jonc is another volcanic sugar loaf dome. A little busy and touristy, but you can fill your water bottle from the source of the Loire river, the longest river in France, which is pretty darn cool! If you want to lock up your bike, you can take a short 20-minute hike to the summit for amazing views.

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