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France
Provence-Alpes-Côte D'Azur
Var
Toulon
Ollioules

Gros Cerveau Loop

Moderate

4.5

(61)

296

hikers

Gros Cerveau Loop

02:56

8.34km

320m

Hiking

Hike the moderate 5.2-mile (8.3 km) Big Brain loop near Ollioules, France, offering panoramic Mediterranean views and 1049 feet (320 metres)

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

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1

3.17 km

Gros Cerveau

Highlight • Summit

This 446 meter mountain offers views of Marseille and the islands beyond. At the top, you will find Fort du Gros Cerveau.

Translated by Google •

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B

8.34 km

End point

Parking

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Way Types & Surfaces

Way Types

3.79 km

2.26 km

1.58 km

669 m

Surfaces

3.42 km

3.07 km

1.13 km

573 m

< 100 m

< 100 m

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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 (410 m)

Lowest point (160 m)

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Weather

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Friday 8 May

22°C

10°C

0 %

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Max wind speed: 24.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What are the main differences between the blue and red trail options on The Big Brain - loop?

The Big Brain - loop offers two main marked routes: a blue trail and a red trail. The blue trail is shorter, about 8 km with 300 meters of elevation gain, taking 3.5 to 4 hours. It's considered moderate but has steep sections. The red trail is longer and more strenuous, about 13 km with 700 meters of elevation gain, requiring 5.5 to 6 hours. It's designed for experienced hikers with very good fitness and sure-footedness, potentially requiring some alpine experience.

Where can I park to access this trail?

The trail is accessible from areas near Ollioules and Sanary-sur-Mer. While specific parking lots aren't detailed, hikers typically find parking at the base of the massif in these towns to begin the loop. For the most up-to-date information on parking, it's always best to check local tourism websites like sanary-tourisme.com or bandoltourisme.fr.

Is The Big Brain - loop trail dog-friendly?

Generally, dogs are permitted on trails in the Massif du Gros Cerveau, but they must be kept on a leash to protect local wildlife, especially the Rove goats, and to ensure the safety of other hikers. Always check for any specific local signage or restrictions before heading out with your dog.

What is the best time of year to hike this route?

Spring and autumn are ideal for hiking this trail, offering pleasant temperatures and vibrant scenery. Summers can be very hot, and the region is susceptible to fires, so hiking might be restricted or less comfortable. Winters are generally mild, but some sections could be slippery after rain.

Do I need a permit or pay an entrance fee to hike in the Massif du Gros Cerveau?

No, there are no specific permits or entrance fees required to hike The Big Brain - loop trail or access the Massif du Gros Cerveau. It is a natural area open to the public. However, always respect local regulations, especially regarding fire prevention and wildlife.

What kind of views can I expect along the way?

The trail offers breathtaking panoramic views. You'll see the Mediterranean Sea, stretching from the Gien peninsula to the islands off Marseille, and the splendid Sanary Bay. You'll also get views overlooking the bay of Bandol and the coastline. The summit, Gros Cerveau, is a particularly rewarding viewpoint.

What should I bring for a hike on this trail?

Given the moderate to difficult terrain and potential for steep sections, sturdy hiking shoes are essential. Bring plenty of water, especially on warmer days, and extra food. A walking stick can be very helpful for balance on uneven or steep parts. Don't forget sun protection and a map or GPS device.

What kind of wildlife and vegetation might I encounter?

You might spot Rove goats, recognizable by their distinctive triangular and twisted horns, roaming freely in the massif. The area also boasts diverse Mediterranean flora, including umbrella pines, agaves, seacrystal (Perce pierre or sea fennel), alfalfa trees, and holm oaks.

Are there any historical features or landmarks on the route?

Yes, the ridge of the massif features two defensive fortifications, the Pointe structure and the Gros Cerveau fort, which were constructed between 1890 and 1900. These historical sites add an interesting dimension to the scenic hike.

Does this trail intersect with other well-known paths?

Yes, the route intersects with several other paths. You'll find sections that are part of 'De Ollioules à Bandol', 'Le Gros Cerveau', 'Sentier Chasseurs', and 'Piste Chasseurs'. There are also smaller sections of 'Sentier Pierrier', 'Déviation sentier bleu', and 'Ancien sentier bleu'.

Is The Big Brain - loop suitable for families with young children or strollers?

The hiking paths on this loop are generally not suitable for strollers due to steep and uneven sections. While the blue trail is shorter, it still features fairly steep parts that may be challenging for individuals with walking difficulties or very young children. It's best suited for families with older children who are experienced hikers and sure-footed.

What is the origin of the name "The Big Brain"?

The name "The Big Brain" is a translation from the Provençal "Lou Gro Cervo," which actually means "the Big Stag." This refers to a legendary creature that was said to have inhabited the massif in the 18th century, giving the area its unique and intriguing name.

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Trail Reviews

Fabio M
April 1, 2024, Boucle du Gros Cerveau à Ollioules

Park at the Car Park, (Route du Gros Cerveau – next to the Astronomical Observatory). Cross the road, take the GR 51 (towards La Cadière) which runs along the fence of the Hugueneuve water treatment plant (the fence is on your left). A path climbs slightly into the scrubland.

Translated by Google

Level: Intermediate Marking: Blue / Red and White Starting Point: Gros Cerveau Observatory Parking This hike in the heights of Ollioules offers superb panoramas of the hinterland and hills—the Destel Gorges, the Evenos sandstone, and Fort Pipaudon—and sweeping views of the coastline, from the calanques of Cassis to Porquerolles, via Les Embiez and Toulon Bay. At the summit, admire the recent restoration of the Gros Cerveau fort, a military building dating from 1890, before beginning the descent on hilly trails through forest, scrubland, and scree. From June to September, check the condition of the massifs before setting off on your hike: https://www.risque-prevention-incendie.fr/var/index.html

Translated by Google
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