The three rivers around Mont Réal

de fr

A walk starting from the church at Bosc-Guérard-Saint-Adrien, offering varied scenery, including woodland, a lush green valley, the village of Montville and its leisure centre, largely following theGR®®25,GR®®25dandGR®®210routes.
Crosses the rivers Cailly, Clairette and Sondres.
Along the route, you’ll see some beautiful buildings typical of the region, as well as the remarkable church in Montville with its Republican pediment.

Details

n°1745107
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 7.32 mi
  • ◔
    Average duration: 3h 45 
  • ▲
    Difficulty: Moderate
  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 427 ft
  • ↘
    Descent: - 427 ft
  • ▲
    Highest point: 574 ft
  • ▼
    Lowest point: 144 ft
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Photos

Palmipeds
Barnacle geese
Le Cailly
Valley landscape

Description of the walk

Car park at the church in Bosc-Guérard-Saint-Adrien on the right-hand side of the D47 Route de l’Église.

(S/E) Head west towards Montville. At the roundabout, turn left towards the recycling centre via Rue des Réservoirs. Continue to the hamlet of Bois-le-Vicomte.

(1) Carry on straight ahead to pass through the hamlet of Bois-le-Vicomte. Continue along a dead-end road which turns into a path at the edge of the forest as it bends to the right. Very soon, it branches off to the left and enters the forest.

(2) After a 300-metre descent, at the crossroads, take the path on the right which leads downhill – theGR®®25d.

(3) At the hunting lodge, carry on straight ahead along theGR®®210at the edge of the Bois du Mont Réal. You’ll reach the road (Rue André Martin) at the Auberge de la Renardière.

(4) Cross the road (D155) with care and take the narrow street opposite, Rue des Rivières. This street crosses the Sondres stream and the Cailly twice.

(5) At the Stop sign, turn right onto Rue du Dr Martel. Please take care: this section is a little dangerous due to the traffic and the lack of a hard shoulder. Stay on Rue du Dr Martel until you reach the Montville police station.

(6) After the police station, turn right onto the dead-end street leading to a housing estate. This street continues to the right along a footpath that crosses the Clérette and carries on to the left to reach the pond at the leisure centre, with its many waterfowl.
Walk round the pond, past the swimming pool, to reach Montville Church and Place de la République.

(7) From the church, cross the Place de la République to reach the Town Hall. Then head towards the funeral parlour at the bottom of Rue des Déportés.

(8) Turn right and walk straight up Rue des Déportés to the cemetery; the slope is quite steep. After the cemetery, join theGR®®25, which continues to climb towards Bosc-Guérard-Saint-Adrien. As you emerge from the woods, continue along theGR®® through the residential area until you reach the fourth junction with Rue du Petit Bosc-Guérard.

(9) Turn right, then left towards the church (S/E).

Waypoints

  1. S/E : mi 0 - alt. 571 ft - Church of Bosc-Guérard-Saint-Adrien
  2. 1 : mi 1.13 - alt. 545 ft - Bois le Vicomte
  3. 2 : mi 1.63 - alt. 400 ft - Junction °°GR®°°25d
  4. 3 : mi 2.71 - alt. 279 ft - Hunting lodge
  5. 4 : mi 3.54 - alt. 203 ft - Crossing the D155
  6. 5 : mi 3.98 - alt. 151 ft - Turn right at the Stop sign after the - Cailly (rivière) - Affluent de la Seine
  7. 6 : mi 4.86 - alt. 207 ft - Turn right after the police station - Clérette (rivière) - Affluent du Cailly
  8. 7 : mi 5.33 - alt. 171 ft - Montville Church
  9. 8 : mi 5.46 - alt. 180 ft - Funeral parlour, Rue des Déportés
  10. 9 : mi 7.1 - alt. 571 ft - Rue du Petit Bosc-Guérard
  11. S/E : mi 7.32 - alt. 571 ft - Church car park

Notes

The forest sections are quite muddy; do this walk in dry weather or, alternatively, with good walking boots and walking poles.

Worth a visit

This circular walk is heavily inspired by a longer and more challenging one offered by the Clères Canton Tourist Office, known as Loop E ‘Par monts et par vaux’, which starts in Montville and passes through the village of Eslette.

If you have time, make the most of it and visit the fire brigade museum in Montville.

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.

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Reviews and comments

4.4 / 5
Based on 16 reviews
Reliability of the description
4.5 / 5
Ease of following the route
4.6 / 5
Route interest
4.1 / 5
MisParker
MisParker

Overall rating : 4.7 / 5

Date of your route : Apr 19, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Route update: the bridge at the finish in Montville is impassable. We had to turn back and take the main road, then through a housing estate to reach the lake.
Otherwise, everything is lovely on this walk. I would still recommend walking boots, as the path is stony.

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lesien
lesien

Overall rating : 4 / 5

Date of your route : Jan 30, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Pleasant route

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Sofrac
Sofrac

Overall rating : 3.7 / 5

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

The start of the route is not bad but the return journey after the pond is average as you pass through buildings and the long stretch of road is dangerous.

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Emelinelefebvre
Emelinelefebvre

Overall rating : 4.7 / 5

Date of your route : Sep 02, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

Very well explained
Great course

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coiffier
coiffier

Overall rating : 5 / 5

Date of your route : Aug 12, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

I really enjoy this hike, which I do regularly.
The variety of the hike is enjoyable.
For those who don't like hills, take your time on the way out of Montville.

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trekman
trekman

Overall rating : 4.3 / 5

Date of your route : Jun 10, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Enjoyable hike on Sunday, 9 June.
A few comments:
- the forest road between 3 and 4 was still full of water... but fortunately there is always a small path above it,
- the section between 5 and 6 is on a road with no pavement or hard shoulder. I'm not sure I'd do it on a Saturday, and certainly not in a group... it's better to cut across at point 4 in Montville, even if it means going past the leisure centre,
- the return to Bosc-Guérard is pleasant through the woods.
Thank you for this hike.

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paulev
paulev

Overall rating : 5 / 5

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

A very beautiful hike, especially in spring. You need to be careful on the section leading to Montville, as the road is narrow and has no hard shoulder. The forest path was very muddy, so wear appropriate footwear.

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Papotam
Papotam
• Edited:

Overall rating : 4.5 / 5

Date of your route : Mar 24, 2024
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

It just goes to show that places you know from cycling or driving through them reveal many secrets when you explore them on foot. A few open clearings, pleasant in the spring sunshine and, above all, sheltered from the westerly wind. It's a real pleasure to arrive in Montville via this valley, which you can see on the right when driving from Houppeville...
Admittedly, the D51 is less pleasant, with no pavement, but it offers a beautiful view of the valley and is only 1,500 metres long, with few cars on this Sunday at midday.
It's a tough climb leaving Montville, but we ride alongside the cemetery, which motivates us not to stop for a breather. We'll have plenty of time for that one day
The route is very muddy and slippery, so you need to be equipped accordingly.
I really enjoyed it. We set off in wind and rain and finished in sunshine.
As always, I would have liked to post a few photos, but the limits imposed by Visorando dissuade me. 10 MB max in 2024 is very little, no doubt a hosting issue. Perhaps the site could provide an online tool to automatically reduce the size according to their rules instead of sending an error message...

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RPME
RPME

Overall rating : 4.3 / 5

Date of your route : Nov 23, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A long journey

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Luc Vignol
Luc Vignol

Overall rating : 4.7 / 5

Date of your route : Oct 01, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The nearly 12 km hike is very pleasant and varied. The only drawback is that it runs alongside the D 51 (Rue du Docteur Martel) for a good kilometre, a dangerous road with virtually no shoulder, as the description points out. It seems difficult to avoid it, as the road is located between the railway line and the Clerette river, unless you significantly extend the route. That's a shame.

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benoitrando
benoitrando

Overall rating : 4.7 / 5

Date of your route : Nov 06, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

I did the route with the Par Monts et par Vaux supplement from the tourist office, which is longer. It's true that the section on Rue du Docteur Martel is quite dangerous if you're not careful, but you just need to walk on the left-hand side of the road to see the vehicles coming and keep yourself safe. However, I don't see why Rue des Réservoirs is dangerous, as there is plenty of room to keep yourself safe on both sides.

Please note: on the Monts et Vaux route, when descending through the forest from Eslettes, the footbridge over the railway tracks is closed. The problem is that this is the only possible route, unless you turn back and descend via the path you took on the way up.

Thank you for this route, Dominique, I found it quite enjoyable.

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PissyRandonneurs
PissyRandonneurs

Overall rating : 4.7 / 5

Date of your route : Jul 19, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The description is clear, and the map is accurate. Some sections appear dangerous, but they are all indicated in the description. There are very few people on this route early on Sunday mornings, just a few mountain bikers on the trails.
Rue des Réservoirs is of no interest.
Thanks to Dominique.

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vis0
vis0

Overall rating : 3.7 / 5

Date of your route : Jun 02, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★☆☆ Average
Very busy route : No

A few nice stretches, but too many uninteresting roads for our taste.

Kind regards, Valérie

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GS040354
GS040354

Overall rating : 4 / 5

Date of your route : Aug 25, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

I have completed this hike. There are two areas that are dangerous for hikers. Do not use the road leading to the reservoirs, as it is dangerous due to vehicles travelling to the waste disposal site. Instead, use the salt road that leads to Bois le Vicomte.In Montville, do not take the D51 due to traffic and the narrow grass verge. From Mont Réal, use the pavement along the D155, then take the GR trail that passes in front of Bricomarché and leads to the gendarmerie and then to Lake Montville.

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randonnéess
randonnéess

Overall rating : 4.3 / 5

Date of your route : May 01, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

In fact, we were familiar with quite a few sections, especially with the MONVILLE hike that you established

but interesting

THANK YOU E. MIDRIER

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