Route Calern in Caussols

This hike of around 15 km takes you across the Calern plateau to its summit, allowing you to appreciate its karstic landscape, particularly the sinkhole, and to discover along the way the Notre-Dame de Calern cave-chapel as well as the Calern observatory site with its “bubble houses”.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 9.15 mi
  • ◔
    Average duration: 5h 25 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 1,355 ft
  • ↘
    Descent: - 1,385 ft

  • ▲
    Highest point: 4,777 ft
  • ▼
    Lowest point: 3,556 ft

Description of the walk

From Saint-Vallier-de-Thiey, take the D5 then the D12 towards Cassols. Park in the village car park.

(S/E) The walk starts at the crossroads below the car park at marker 30. At the roundabout, follow theGR® 4 to the left, which takes the paths of the Church, then of Notre-Dame de Calern, before giving way to a stony path leading to the foot of a rocky outcrop. You’ll reach a junction.

(1) Leave theGR® 4 to the left, then a few metres further on, turn right onto a path marked by a cairn which leads to the entrance of the cave/chapel. You will come to another crossroads.

(2) Take the path above the cave to reach the plateau.

(3) At the junction, turn left until you reach the next crossroads.

(4) Keep left on the cairn-marked path towards the summit of Calern (1,458m).

(5) Panoramic view of the Mercantour and Argentera peaks. Then head down to the right along a track, which you should follow to the junction above the ridge.

(3) Continue straight on to the next junction (marker 50,GR®4).

(6) Continue straight on until you reach a road leading to an observatory.

(7) You can stop for a picnic and admire Antti Lovag’s “bubble” houses. Resume the route along the ridge to marker 47.

(8) This marker on the right signals the start of a fairly stony descent, which should be tackled with caution. Ignore a track on the right, then at the next junction continue straight ahead and then turn right onto the path. Join the track further down and turn right, then right again onto a path. Continue along the descending path to the main road.

(9) First turn left then right to join the old Roman road that linked Ventium (Vence) to Castellanne. Continue to the next junction.

(10) Take a barely visible path on the right to head back towards Caussols. Follow it to the next junction.

(11) Turn right, then veer left until you reach the road.

(12) Turn right again until you reach the A-road at marker 51.

(13) Keep left. Continue to marker number 30 and the starting point. (S/E)

Waypoints

  1. S/E : mi 0 - alt. 3,612 ft - Marker 30
  2. 1 : mi 1.12 - alt. 4,180 ft - Turn right at the cairn
  3. 2 : mi 1.13 - alt. 4,190 ft - Turn left
  4. 3 : mi 1.19 - alt. 4,281 ft - Turn left onto the plateau
  5. 4 : mi 1.51 - alt. 4,386 ft - Turn left (cairn)
  6. 5 : mi 2.25 - alt. 4,774 ft - Sommet de Calern
  7. 6 : mi 3.6 - alt. 4,167 ft - Marker 50
  8. 7 : mi 4.61 - alt. 4,163 ft - Observatory
  9. 8 : mi 5.45 - alt. 4,255 ft - marker 47
  10. 9 : mi 6.66 - alt. 3,586 ft - Departmental road
  11. 10 : mi 6.85 - alt. 3,652 ft - Path on the right
  12. 11 : mi 8.29 - alt. 3,638 ft - Turn right
  13. 12 : mi 8.63 - alt. 3,615 ft - Route
  14. 13 : mi 8.92 - alt. 3,570 ft - Marker 51
  15. S/E : mi 9.15 - alt. 3,609 ft - Marker 30

Notes

Public toilets and a bakery/bar next to the car park.
No water points along the route.

Worth a visit

A visit to the Grotte-Chapelle is a must, as is a tour of the “bubble houses” near theobservatory.

Always be cautious and plan ahead when you're outdoors. Visorando and the author of this route cannot be held responsible for any accidents occurring on this route.

The GR® and PR® markings are the intellectual property of the Fédération Française de Randonnée Pédestre.

Reviews and comments

4.4 / 5
Based on 5 reviews

Reliability of the description
4.4 / 5
Ease of following the route
4 / 5
Route interest
4.8 / 5
cathy86
cathy86

Overall rating : 4.3 / 5

Date of your route : May 25, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Stunning scenery and 360° views from the summit of Calern.
We had trouble spotting the start of the descent at point 8 and ended up taking a rather steep route down.
A lovely hike nonetheless.

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miloumoi
miloumoi

Overall rating : 5 / 5

Date of your route : May 05, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A hike in the rain, but we enjoyed it all the same. A lovely hike.

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yves.drapp
yves.drapp

Overall rating : 4.3 / 5

Date of your route : Nov 04, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

A pleasant and varied walk. There’s quite a bit of climbing at the start, followed by a relatively flat stretch on the plateau above Caussols. A visit to the observatory and the bubble house is well worth it. Take care on the descent as the slope is steep in places. The final part of the walk is on flat ground.

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catherine.schnoor
catherine.schnoor

Overall rating : 3.3 / 5

Date of your route : Jan 15, 2024
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★★★ Very good
Very busy route : No

The signposts aren’t very clear.

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randonneurintrépide
randonneurintrépide

Overall rating : 5 / 5

Date of your route : Sep 11, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Avoid this route in hot weather as there are no trees.
The view from the top is superb.

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