The Marais and the Château de La Frette

A short walk down to the Bièvre plain and then back up to mid-slope. This route is not difficult, except for a short steep climb on leaving Saint-Hilaire.

Details

773420
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 8.11 km
  • ◔
    Average duration: 2h 30 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 63 m
  • ↘
    Descent: - 54 m

  • ▲
    Highest point: 455 m
  • ▼
    Lowest point: 398 m

Photos

Description of the walk

Car park next to the church.
(S/E) Leave the church forecourt and take the street that descends steeply towards the plain (Chemin de Meyzin).

(1) You will reach the D73 (stop sign). Cross it (pedestrian crossing) and turn right. Take the first street on the left (Chemin de Chenavas). This will take you out of the town. The street suddenly changes name to Chemin des Brosses.

(2) Shortly afterwards, at a fork, take the right-hand branch (gravel road). Leave another gravel road on your left. Your road turns left on its own. Almost immediately, take the pretty grassy path that branches off to the right.

(3) Veer slightly left to reach a small road and the Étang du Marais. Turn left, then further on, right to go around the pond.
A log bridge crosses a stream that is often dry. Your path turns right to follow the edge of the pond. Benches and tables are provided for you to take a break if you wish.
At the end of the pond, continue along the path to the left of the hut, which runs alongside the marsh. Ignore the paths that branch off to the right or left and continue along the tarmac road towards the hill on the right.

(4) Be careful, as vehicles may be travelling at speed for a few metres. At the end of these few metres, you will come to a fork. Take the right-hand fork. A sign indicates that the street is about to become one-way (which is good news for you...). Continue along this small road, which will take you into Saint-Hilaire-de-la-Côte.

(5) You will come to the D73, which you cross to head towards the hillside opposite (Chemin du Lavoir). At the end, you will see a path leading off opposite, along a low wall. This is the only difficult part of the walk: a 30-metre climb over 300 metres. Take your time...

(6) You will see a sign in front of you: "Saint-Hilaire - 440m". Turn right. You are now on the GR® 65, which leads to Santiago de Compostela (red and white markings and yellow and blue shells). When your small road turns left, continue straight ahead on the stony path.
You will then come to a road. Turn left and very quickly turn right onto another path. After a while, this path turns right into a small valley and leads to the hamlet of Le Plantier.

(7) At the hamlet, go straight ahead and then quickly turn left (Chemin du Bois). At the next fork, go left (still on Chemin du Bois). You will be walking with the woods on your left and a field on your right.

(8) When the field ends, take the path on the right (leaving the GR® 65). A blue sign indicates that this is a private road and that dogs must be kept on a leash. You are therefore allowed to use this path.
Your path turns left. You walk alongside the castle grounds for a while. There is a high hedge, but you can still see the Château de la Villardière clearly.

(9) At the end of the path, you will see La Frette Church in front of you. Take the time to walk back and forth on the left to the castle gate.
On your return, you will find yourself back at the starting point in front of the church (S/E).

Waypoints

  1. S/E : km 0 - alt. 443 m - Car park next to the church in La Frette
  2. 1 : km 0.37 - alt. 421 m - D73, first crossing
  3. 2 : km 1.38 - alt. 417 m - At the fork, take the gravel road on the right.
  4. 3 : km 2.35 - alt. 407 m - The Marais Pond
  5. 4 : km 3.42 - alt. 401 m - On the right, at the road
  6. 5 : km 4.23 - alt. 400 m - D73, second crossing
  7. 6 : km 4.93 - alt. 441 m - Saint-Hilaire sign 440m
  8. 7 : km 6.22 - alt. 449 m - Le Plantier sign 445m
  9. 8 : km 6.77 - alt. 447 m - Leave the GR65 and turn right.
  10. 9 : km 8.04 - alt. 446 m - Turn left to return.
  11. S/E : km 8.11 - alt. 443 m - Car park next to the church in La Frette

Notes

La Frette is a small village in the Dauphiné region located along the D1085, about halfway between Grenoble and Lyon.
You can park in the car park next to the church halfway up the hillside.

On the banks of the Étang du Marais, there are benches and two picnic tables.

La Côte-Saint-André, approximately 8 km away, has all the shops and services you could need.

Worth a visit

The marsh and its pond are nestled in the heart of the Bièvre plain.

The Château de la Villardière (to my knowledge, it is not open to visitors).

In La Côte-Saint-André, you can admire the old market halls, the Hector Berlioz Museum and the villa of the painter Jongkind.

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

4.3 / 5
Based on 9 reviews

Reliability of the description
4.6 / 5
Ease of following the route
4.4 / 5
Route interest
4 / 5
CLERC Jocelyne
CLERC Jocelyne

Overall rating : 4 / 5

Date of your route : Oct 02, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Easily accessible hike without much difficulty, the only downside being a little too much tarmac road along the entire route
A few hesitations so as not to miss the route
Thank you for this discovery.

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Solène M.
Solène M.
• Edited:

Overall rating : 4.3 / 5

Date of your route : Apr 11, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★☆☆ Average
Very busy route : No

A good walk to do "among humans", not practical if you have a dog with you: most of the walk is on tarmac paths in full sun (so hot for their paws) and busy with vehicles, or private paths where dogs must be kept on a lead. It took me 1.5 hours at an average speed of 5 km/h for a total of 7.58 km. The ponds are pleasant, but beware of snakes, which are very present in warm weather around the ponds and in the wooded areas. Thank you for this route!

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dachrys
dachrys

Overall rating : 4.7 / 5

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

Perfect for a short walk, a real discovery, especially the ponds. Thank you to the author for this walk.

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mariethe.
mariethe.

Overall rating : 4 / 5

Date of your route : Nov 04, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Lovely walk
Very little elevation
Be careful at number 8, as the path is now private, so continue straight ahead

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FIFICB
FIFICB

Overall rating : 4 / 5

Date of your route : Apr 02, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A pleasant walk that follows a small section of the Camino de Santiago at the end of the route.

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Esmeralda038
Esmeralda038

Overall rating : 3.7 / 5

Date of your route : Feb 10, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★☆☆ Average
Very busy route : No

Not recommended after heavy rain, as the paths become marshy.

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Edenath
Edenath

Overall rating : 5 / 5

Date of your route : Aug 18, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

Hike without any difficulty

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Viviane H.
Viviane H.

Overall rating : 5 / 5

Date of your route : Apr 30, 2018
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A very pleasant walk that can be done in either direction without any worries.
Starting from the castle allows you to take a break for a snack by the pond before the end of the walk.

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Yannick_Josset
Yannick_Josset
• Edited:

Point 9, very close to the start/finish line, corresponds to the end of the route, where you can return to the castle gate.
Best regards
Yannick

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catherine Haddad
catherine Haddad

Overall rating : 4.3 / 5

Date of your route : Jan 01, 2018
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

A lovely little winter walk to stretch your legs, but there is an error on the map of the route where point 9 is located. It is actually point 1, but the error is easy to spot and the starting point is indeed at the church, so you should enter 1 and not 9.

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