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Panorama of the Authion hike in Mercantour National Park, France

The Authion Route Guide

Difficulty
This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
Easy
Elevation
This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
356 m
Distance
This reflects the return distance of this route as measured by the GPS file.
7.9 km
Duration
This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
2.5-3.5h
User Ratings
These ratings are completed by users who have completed this trail and not subject to reviews by 10Adventures.
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical DIFF
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Technical DIFF
Directions to Trailhead
This hike is an ideal walk for the history buff in your family. The Authion has been long considered the keystone of the defensive system for the Alpes–Maritimes: from 1388 all the way up to WW2. On your hike you can see an American tank from 1945 on display.

Route Description for The Authion

The paved road is divided into two, and you want to take the road that rises to the left and continues for 2 km. You can admire the panorama to the South, the Côte d'Azur, and the Provence mountains.

After 2 km, you will come to a pass where there is a low building. Take a right on the trail that heads into the larches towards the Mille Fourches Fort, which you will reach in less than half an hour.

The Fort, built at the end of the 19th century, was restored in the ‘30s with two reinforced concrete posts. From the fort you can enjoy a wonderful view of the Alpes Maritimes, the Ligurian Alps, and the French Riviera.

Go back towards the low building, and take the military road on your left that, with a gentle slope and long bends, climbs up to Fort La Forca, which is Mille Fourches twin structure. Just below the fort there are the barracks that once hosted garrisons all year long.

From the highest point you can enjoy the view on the Reducte des Trois Communes, the symbol of the Authion fortifications. You can also see the Hautes Alps and the tops of the Valley of Wonders, the Grand Capelet and the Bego.

Continue along the crest and reach a path, with a signalling pole. Continue on the right until you reach the Reducte des Trois Communes, passing by the barracks.

La Redoute was built in 1898; it once housed 50 men and controlled the access from the Roya Valley. In 1945, during the war, it was damaged.
On the South slopes, 100 m below, is the Plan Caval defensive system, with trenches and bunkers from the 19th and 20th centuries.

From La Redoute turn back you’ll reach a familiar junction on the pass. Continue straight, to the west on the crest. You’ll reach the parking lot in less than 30 minutes.

Want the planning handled? Browse our self-guided French Alps hiking tours, or see our full range of hiking tours worldwide.

Insider Hints for The Authion

  • If you arrive from Nice, visit the nice village of La Bollene Vesubie. If it’s a hot day their outdoor pool has an amazing backdrop. Not a bad way to escape the heat.
  • If you arrive from Menton visit Sospel. They have a beautiful 800-year-old bridge, and a charming little cinema.
  • Check out Les Trois Vallees or Hotel Les Chamois if you’re looking for a place to stay. Both hotels come highly rated, aren’t overly fancy, and are full of local spirit.

Getting to the The Authion Trailhead

If you are leaving from or through Sopsel, head to the Col de Turini, famous for the Monte Carlo Rally, then you’ll continue on the right to the Authion. After 4 km you arrive at Cabane de Tueis, where you can park your car.

Route Information for The Authion

  • When to do:

    April to end of October

  • Backcountry Campsites:

    Yes, on the site, or in Sospel, Moulinet, La Bollene, or Lantosque

  • Toilets:

    Yes, at Gite d'Etape and bar, Col de Turini

  • Family friendly:

    Yes

  • Route Signage:

    Average

  • Crowd Levels:

    Moderate

  • Route Type:

    Circuit

The Authion Elevation Graph

Weather Forecast

Check Area Weather

Reviews for The Authion

9.8
20 reviews
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Antoanette LavroutteAugust 2020

This Hike is giving me Game of Thrones Vibe. I'm mesmerized.

Overall Rating
9
Trip Length
03:00
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
TeddyBearJuly 2020

A quiet and impressive hike with very beautiful landscape

Overall Rating
9
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Rolando AcciaioJuly 2020

The family enjoyed the hike and it took 4 hours from us to achieve

Overall Rating
10
Trip Length
04:00
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Felix LegrandJuly 2020

Such a beautiful place to be and great views

Overall Rating
10
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Vincent V.December 2019

Amazing place with lovely scenery and remarkable history!

Overall Rating
10
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Mina P.August 2019

We really enjoyed this rip. Amazing place with good scenery and remarkable history. Wonderful photo spots.

Overall Rating
10
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Mercury Q.August 2019

You can visit the beautiful village of La Bollene Vesubie. If it’s a hot day you should definitely try their outside pool. Not a bad way to escape the heat.

Overall Rating
10
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Cole Anx.August 2019

It was a really charming place. Makes me wonder about the different lives I had in my past life.

Overall Rating
10
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Abraham W.August 2019

Interesting place! Ideal walk for the family. You can see an American tank from 1945 on display. There are the barracks that once hosted garrisons all year long.

Overall Rating
10
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Ramesh PatelAugust 2019

Great photo spots! Nice and easy. Interesting in every way!

Overall Rating
10
Technical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.
Physical Difficulty
Easy (Circle)
Suitable for beginners, families, young children, and those looking for a casual adventure.

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Last Updated: June 16, 2026

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