Around the Grand Plâtre hill

This is a varied walk, alternating between woods and pond banks. You can enjoy a few views of the Chartreuse peaks and, if the weather is very clear, even the highest peak of Mont Blanc.

Details

387323
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Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 10.44 km
  • ◔
    Average duration: 3h 30 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 174 m
  • ↘
    Descent: - 172 m

  • ▲
    Highest point: 541 m
  • ▼
    Lowest point: 389 m

Photos

Description of the walk

(S/E) Leave the car park and take the Morchamp road. This is a small road heading east. You will have the wooded moraine on your right and the Bièvre plain on your left.
You will pass the beautiful Chanclau Pond and allotment gardens, then the road turns into a dirt track. Follow this track until you enter the town of Sillans, where the road becomes paved again.

(1) Your small road leads to a T-junction. Take the lane to the right.
This lane curves to the left and comes to an end. Follow the beautiful path opposite. It runs alongside a stream. At the end, turn right and then very quickly left (you will leave the yellow markings).

(2) You begin the only real hill of the walk, but it is beautiful. Continue your ascent, ignoring what comes from the right or left. When you come to a fork, take the wider path that climbs to the right. When the gradient levels out, you come to a first path, which you take on the left.

(3) You will then arrive at a wide, stony ridge path. Turn left again. When the path turns left, leave it and take the path opposite, which quickly begins to descend.

(4) You will arrive at a pass, at a place called Les Moilles (sign). Descend to the right. Continue your descent to the Plan ponds (sign).

(5) You will come to a small road, which you take on the right. Follow it to the third pond. It turns left on its own.

(6) Turn onto the first path on the right, into a small walnut grove. Walk alongside two other ponds and continue, ignoring any paths coming from the right or left.

(7) You will come to a crossroads (you can see the D154 road a little further on). A yellow cross blocks the path in front of you. Turn right. You will see a valley on your left, with the village of Saint-Geoirs and a hill on your right.

(8) After a while, your wide path turns to the right and leads you to a place called Les Hautes Ayes (signposted "Château des Ayes"). Turn right, but not before taking a look at the château from the crossroads. At the two forks in the path, take the left-hand branch (follow the yellow markings).

(9) You will cross the hamlet of Patouly. Your small road descends directly to Saint-Étienne. When you reach Rue Octave Chenavas, turn right to return to the roundabout where you started (S/E).

Waypoints

  1. S/E : km 0 - alt. 391 m - Eastern end of the main street
  2. 1 : km 3.1 - alt. 401 m - Factory with solar panels on the roof
  3. 2 : km 3.41 - alt. 413 m - Turn left when leaving the yellow markings.
  4. 3 : km 4.5 - alt. 540 m - Wide stony ridge path
  5. 4 : km 5.01 - alt. 507 m - Signposted "Les Moilles" - 510m
  6. 5 : km 5.24 - alt. 492 m - Signposted "Les étangs" - 490m
  7. 6 : km 6.15 - alt. 490 m - Crossroads after the third pond in Plan
  8. 7 : km 7.28 - alt. 454 m - Crossroads before the D154
  9. 8 : km 8.28 - alt. 472 m - Sign for "Château des Ayes" - 469m
  10. 9 : km 9.24 - alt. 461 m - Hamlet of Patouly
  11. S/E : km 10.44 - alt. 391 m - Eastern end of the main street

Notes

Park your vehicle in the small car park next to the roundabout at the eastern end of the main street in Saint-Étienne-de Saint-Geoirs (Rue Octave Chenavas).

In Saint-Étienne, you will find just about everything you need.

Worth a visit

There are numerous ponds along this walk.

Along the walk, in Sillans, you can make a slight detour to visit the Château, a kind of fortified farm.

Reviews and comments

4.5 / 5
Based on 11 reviews

Reliability of the description
4.6 / 5
Ease of following the route
4.7 / 5
Route interest
4.3 / 5
buttin
buttin

Overall rating : 4.7 / 5

Date of your route : Dec 18, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Returning it must be quite frequent, but be careful as there is a lot of traffic from motorcycles coming from the right and left.

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TineDo
TineDo
• Edited:

Overall rating : 4.3 / 5

Date of your route : Jul 28, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★☆☆ Average
Very busy route : No

A short, easy walk starting from the Chanclau stream, along a large field of sunflowers. The brief passage through the small village of Sillans is not particularly interesting, except for a fortified farm (?) near the exit. A short climb up a stony path, a few blackberries picked along the way, and then the descent to a string of refreshing ponds. Water lilies in bloom on the last one. The Château des Ayes (more of a beautiful bourgeois house) is a lovely discovery, a beautiful setting for this hotel and restaurant in a large, very pleasant park.

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Viperine
Viperine

Overall rating : 3.7 / 5

Date of your route : Mar 09, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

Reconnaissance route, well signposted.
The paths are too muddy at this time of year, there is forestry work going on and the path is impassable in places.
The route along the ponds must be very pleasant in less wet weather.

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dachrys
dachrys

Overall rating : 5 / 5

Date of your route : Mar 17, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Thank you to the author for a very beautiful walk. It's true that the climb is steep! However, between points 6 and 7, it's a real nightmare. There has been logging, the path is rutted and muddy, with branches across it. The local authorities should ask the foresters to repair the paths after logging. See photos.

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69729902
69729902

Overall rating : 4 / 5

Date of your route : Oct 11, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Lovely walk. We met some mushroom pickers and a few hunters.

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tonrey
tonrey

Overall rating : 4.7 / 5

Date of your route : Feb 10, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A lovely, easy and interesting walk.

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pianoforte
pianoforte

Overall rating : 4.7 / 5

Date of your route : Jan 15, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

The route passes by numerous large ponds, which were as beautiful as they were frozen on the surface, and the sun shone all day!
There was a slight difficulty on the path before reaching the gravel path on the ridge because it was muddy and rutted. The fork was not visible, but by continuing straight ahead, we arrived without any difficulty other than the mud.

A very beautiful, easy and interesting walk.

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gazok54
gazok54 ★

Thank you collines26
I don't quite understand what you mean.
So you didn't use the description and map in the end? You only used the GPS?
If you have any ideas for improving the description, please do not hesitate to share them with us.

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collines26
collines26

Overall rating : 3 / 5

Date of your route : Sep 06, 2018
Reliability of the description : ★★★☆☆ Average
Ease of following the route : Not used / Not applicable
Route interest : ★★★☆☆ Average

A pleasant short hike, you can stop for lunch after the third lake, but there aren't really any options.
Without GPS, I think we would have struggled at the end of the only climb. I think it's important to mention when the terrain is really flat, because the gradient flattens out before that, and there's a path on the left. Anyway, that's just my opinion. Otherwise, it's very peaceful and a very relaxing hike.

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ALO38500
ALO38500

Overall rating : 5 / 5

Date of your route : Apr 26, 2018
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

Hike starting from the car park of the Sillans rugby stadium (point 1 of the description).
Duration of the walk: 3 hours.
A very pleasant walk between seasons, very peaceful and relaxing.
Be careful though, as there are quite a few vipers around!
For a picnic, the private ponds are ideal, but they are fenced off... the "public" ponds are much less welcoming!
A very enjoyable afternoon for my entire walking group.

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citroenc3
citroenc3

Overall rating : 5 / 5

Date of your route : Oct 16, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

Very beautiful hike with the option of picnicking by the ponds. Very peaceful and shaded for hot days.

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bernardino
bernardino ★

Overall rating : 5 / 5

Date of your route : Feb 13, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

We did this hike twice, on Friday to check it out and on Sunday to take our group of hikers. It was a really nice, long walk that everyone enjoyed. There was a bit of mud in the forest on the way up, which meant we had to wash our shoes and trousers afterwards, but we learnt a bit about the history of Mandrin's country, saw lots of water in the ponds and had a beautiful view of La Sure covered in snow.
And as the weather was fine and mild, everyone enjoyed the day.
Thank you to Yannick for this route.

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