4.5
(61)
296
hikers
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
Start point
Parking
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3.17 km
Highlight • Summit
Translated by Google •
Tip by
8.34 km
End point
Parking
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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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'.
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.
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.
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.
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