FrançaisGuest, Sign inJoin
Coin bucolique dans le plateau de Saclay au nord de la ferme d'Orsigny GR de PAys du HurepoixPhoto: VVVCFFrance · CC0
7.5%woodland
Outdoors in Saclay · protected areas, woods and footpaths

Almost every home in Saclay is within 800 m of a park or wood

Waymarked hiking routes add up to 14 km in Saclay. No protected area reaches Saclay; the nearest, Haute Vallée de Chevreuse Regional Nature Park, is 4.2 km from the town center. 7.5% of Saclay is mapped woodland. France has no Outdoors Grade yet: these are the figures, each beside the compared towns’ median.

Protected areas
0%
of the commune’s land
Nearest: Haute Vallée de Chevreuse Regional Nature Park, 4.2 km
Woodland
7.5%
of the land, mapped on OpenStreetMap
Compared town: 13%
Footpaths
22 km
1.6 km per km²
Compared town: 1.7 km per km²
Hiking routes
14 km
waymarked, GR and others
Compared town: 0.3 km per km²
Parks & woods
13
named, in or within 400 m of the commune
First: Bois de la Guyonnerie

Throughout this page, the Essonne median and the France median are the median of compared communes (those with an overall grade), each figure its own median.

What kind of place

What kind of outdoors place is Saclay?

Read from the data: what stands out first, good and less good.

What sets Saclay apart: its hiking routes, then protected land close by.

Against French towns

How Saclay compares with French towns

Each figure against the 3,798 compared French towns (communes with an overall grade): the marked bar is the town’s, the line the median. Described, not graded.

Protected areas0%Share of the land in a national park, regional nature park, nature reserve or Natura 2000 site
NoneMedian 0.1%100
22out of 100
Woodland7.5%Share of the land mapped as forest or woods on OpenStreetMap
Median 13%0100
32out of 100
Footpaths1.6 km per km²Km of mapped footpath and track open on foot, per km² of the commune
Median 1.7 km per km²08+
47out of 100
Hiking routes1 km per km²Km of waymarked hiking routes (GR and others), per km² of the commune
NoneMedian 0.3 km per km²3+
83out of 100

Percentiles among compared French towns; ties count half.

Towns its size

Saclay has the 19th most footpaths per km² of 41 towns its size

The 40 compared French towns nearest in population (4,392 to 4,482 residents), by km of footpath per km². Hover for each one’s protected land and woods; click for its page.

Saclay 1.6
Cap-d'AilBastelicaccia
0612 km per km²

From Cap-d'Ail (10.8 km per km²) to Bastelicaccia (0 km per km²).

Every town in the comparison
TownPaths (km/km²)WoodlandProtectedCoast
1Cap-d'Ail Alpes-Maritimes10.87.8%0.2%On it
2Royat Puy-de-Dôme4.263%0.2%257 km
3Labège Haute-Garonne3.96.5%0%137 km
4Valras-Plage Hérault3.80%26%On it
5Nozay Essonne3.25.7%0%162 km
6Maurecourt Yvelines3.215%0%125 km
7La Chaussée-Saint-Victor Loir-et-Cher311%8.1%215 km
8Montrabé Haute-Garonne36.6%0%142 km
9Thourotte Oise2.88%0.8%116 km
10Haisnes Pas-de-Calais2.73.2%0%67 km
11Écrouves Meurthe-et-Moselle2.623%100%346 km
12Provin Nord2.44.7%0%69 km
13Villeneuve-de-la-Raho Pyrénées-Orientales2.20.2%0%9.8 km
14Vinon-sur-Verdon Var2.134%100%57 km
15Serres-Castet Pyrénées-Atlantiques1.98.9%0%92 km
16Ornans Doubs1.866%92%384 km
17Rousson Gard1.828%0%70 km
18Capdenac-Gare Aveyron1.728%0%177 km
19Saclay Essonne1.67.5%0%153 km
20La Tour-d'Aigues Vaucluse1.524%100%45 km
21Chazay-d'Azergues Rhône1.311%0%262 km
22Craon Mayenne1.11.4%0%92 km
23Vinay Isère1.126%0%200 km
24Morigny-Champigny Essonne0.922%0.4%173 km
25Sierentz Haut-Rhin0.939%36%430 km
26Hergnies Nord0.98.5%100%94 km
27Guignes Seine-et-Marne0.936%0%189 km
28Hesdin-la-Forêt Pas-de-Calais0.951%0%28 km
29Villemoustaussou Aude0.84.8%0%63 km
30Truchtersheim Bas-Rhin0.81.2%0%438 km
31Marckolsheim Bas-Rhin0.837%47%475 km
32Chancelade Dordogne0.748%0%100 km
33Ghisonaccia Haute-Corse0.611%15%On it
34Millas Pyrénées-Orientales0.53.2%0.1%28 km
35Montbeton Tarn-et-Garonne0.48%0%180 km
36Torigny-les-Villes Manche0.35.4%0%38 km
37Angerville Essonne0.33.4%0%174 km
38Miniac-Morvan Ille-et-Vilaine0.216%100%3.2 km
39Mesnil-en-Ouche Eure0.213%0.4%55 km
40Marans Charente-Maritime0.20.3%100%11 km
41Bastelicaccia Corse-du-Sud015%0.2%4.2 km
The map

Parks, woods, footpaths & countryside

Tap a number to zoom to a park or wood. Tap a layer to hide it. The dashed line is the commune’s boundary.

12345678
Green: parks, gardens and woods mapped on OpenStreetMap, named or not.© OpenStreetMap contributors · INPN / PatriNat · IGN
Places to walk

Parks and woods to walk in, in and around Saclay

Named parks, gardens and woods in the commune or within 400 m, the biggest and best-pathed first: Bois de la Guyonnerie leads, at 241 ha. Directions go to a point inside.

First pick

Bois de la Guyonnerie

Wood or forest · 130 m outside the commune
241 ha24.3 km of path
5 h 25 minto walk all 24.3 km of path
4.5 km south-westfrom the center
Chemin des Fonds FanetsRoute de Chasse des Plants de MoulonChemin de la Crête+5 paths
Directionsto a point inside

Bois du Chat Noir

Wood or forest
209 ha20.8 km of path
4 h 35 minto walk all 20.8 km of path
3.1 km eastfrom the center
Chemin Rural Numéro 14 du Chat Noir à VauhallanRoute du CordonChemin de la Voie Creuse+5 paths
Directionsto a point inside

Bois de Corbeville

Wood or forest · 250 m outside the commune
21 ha1.5 km of path
20 minto walk all 1.5 km of path
3.5 km southfrom the center
Allée de la ChâtaigneraieChemin du Clos des MûriersChemin du Guichet à Corbeville
Directionsto a point inside

Bois des Linots

Wood or forest · 10 m outside the commune
19 ha1.4 km of path
20 minto walk all 1.4 km of path
2.3 km north-westfrom the center
Directionsto a point inside

Forêt Départementale des Bois Chauveaux

Wood or forest
22 ha0.2 km of path
2 km northfrom the center
Directionsto a point inside

Forêt domaniale de Versailles

Wood or forest · 40 m outside the commune
8.1 ha0.2 km of path
2.1 km north-eastfrom the center
Directionsto a point inside

Parcelle 6

Wood or forest · 370 m outside the commune
3.7 ha0.9 km of path
10 minto walk all 0.9 km of path
2 km north-westfrom the center
Directionsto a point inside

Parcelle 10

Wood or forest · 220 m outside the commune
4 ha0.8 km of path
10 minto walk all 0.8 km of path
2.1 km northfrom the center
Directionsto a point inside
All 13 named parks, gardens and woods
Bois de la GuyonnerieWood or forest · 241 ha · 24.3 km of path · just outside
Directions
Bois du Chat NoirWood or forest · 209 ha · 20.8 km of path
Directions
Bois de CorbevilleWood or forest · 21 ha · 1.5 km of path · just outside
Directions
Bois des LinotsWood or forest · 19 ha · 1.4 km of path · just outside
Directions
Forêt Départementale des Bois ChauveauxWood or forest · 22 ha · 0.2 km of path
Directions
Forêt domaniale de VersaillesWood or forest · 8.1 ha · 0.2 km of path · just outside
Directions
Parcelle 6Wood or forest · 3.7 ha · 0.9 km of path · just outside
Directions
Parcelle 10Wood or forest · 4 ha · 0.8 km of path · just outside
Directions
Parcelle 9Wood or forest · 2.9 ha · 0.9 km of path · just outside
Directions
Parcelle 12Wood or forest · 3.9 ha · 0.5 km of path · just outside
Directions
Parcelle 3Wood or forest · 2.2 ha · 0.4 km of path · just outside
Directions
Jardin ArgentéPark or garden · 0.7 ha · 0.2 km of path · just outside
Directions
Boisement de Compensation NordWood or forest · 2.6 ha
Directions

Source: © OpenStreetMap contributors (ODbL): named parks, gardens and woods; sizes are the whole site.

Protected areas

Haute Vallée de Chevreuse Regional Nature Park is the nearest protected area, 4.2 km away

The protected areas reaching the commune, and the nearest: national parks, regional nature parks, nature reserves and Natura 2000 sites.

Regional nature park

Haute Vallée de Chevreuse Regional Nature Park

4.2 km from the town center

Share of the commune’s land

Any protected area0%

Designations overlap (a regional park can hold a Natura 2000 site), so the rows don’t add up; the first counts each piece of land once.

Source: INPN / PatriNat, protected areas July 2026, Natura 2000 December 2024; shares of IGN’s commune boundary.

Footpaths and woods

22 km of footpaths and 14 km of hiking routes cross Saclay

Paths, bridleways, steps and tracks open on foot, and waymarked hiking routes, mapped on OpenStreetMap inside the commune; woods are mapped forest and woodland, private woods included.

Footpaths
22 km
1.6 km per km²
Hiking routes
14 km
waymarked: 1 km per km²
Woodland
7.5%
about 1 km² of mapped woods

Km per km² of the commune · mapped on OpenStreetMap

SaclayEssonne medianFrance median
Footpaths1.6
Hiking routes1
02.55 km per km²

Share of the land · mapped woods and forest

SaclayEssonne medianFrance median
Woodland7.5%
0%50%100%

That is less than in 53% of compared French towns for footpaths per km², and for woodland less than in 68% of compared French towns. Hiking routes often follow paths and lanes already counted, so the two lengths overlap: don’t add them. Every home in Saclay is within 800 m of a mapped park or wood, as in most French towns.

23 named hiking routes within 2 km

GR (long-distance)PR (local walk)Other named walk
GR 117 km
GR655 OT4.3 km
GR 655ET0.6 km
PR 119.2 km
PR 1004.7 km
PR 1014.5 km
De la Bièvre à l'Orge19 km
Chemin de Trèves, Igny - Rambouillet11 km
Sentier d’interprétation5.4 km
Boucle Villier, les Rigoles, Tête Ronde4.9 km
Chemin Charles Péguy4.1 km
Circuit St-Aubin Les Plateaux3.2 km

+11 more

3 GR routes pass within 2 km of Saclay: GR 11, GR655 OT and GR 655ET.

Source: © OpenStreetMap contributors (ODbL), extracts of October 25, 2026 (Geofabrik).

When to get out

The best walking months in Saclay: April and June to September

Météo-France’s 1991–2020 normals at Toussus le Noble, 4.4 km away, and the daylight at the town’s latitude. Outlined months have long days, highs of 15 to 30 °C and little rain for the place.

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)8.710.111.713.615.216.115.814.312.510.79.18.3
High (°C)781216192325252116107
Rain (mm)554750506855535852616166

February is the driest month (47 mm) and July the warmest (highs of 25 °C). 68 mm of rain falls in May, the wettest month. Frost comes on about 46 nights a year. The climate in Saclay →

Neighbors

Next to Saclay

The nearest towns of 2,500 or more, colored by the share of their land in protected areas.

Jouy-en-JosasBièvresIgnyVélizy-VillacoublayBucOrsaySaclay
Under 1%1–10 %10–25 %25–50 %50 %+
TownProtectedWoodlandPaths (km/km²)
Saclay0%7.5%1.6
Jouy-en-Josas
7,981 · 2.8 km
0%42%5.9
Bièvres
4,686 · 3.4 km
0%31%3.5
Igny
10,833 · 3.9 km
0%20%5.5
Vélizy-Villacoublay
23,011 · 4.9 km
0%33%7.6
Buc
5,816 · 5.1 km
0%45%5.6
Orsay
16,498 · 5.3 km
0%27%7.3

Jouy-en-Josas, Bièvres and Igny are more wooded.

How to read these numbers

What this data can and can’t tell you

  • Protected areas. National-park cores, national parks’ outer areas, regional nature parks, nature reserves and Natura 2000 sites, from INPN. A national park’s core is strictly protected; its outer area and a regional park are charters between communes, not bans. Designations overlap, so the total counts each piece of land once.
  • Woodland. Forest and woods as OpenStreetMap maps them, private woods included: woods nobody has mapped are missing, and a mapped wood isn’t necessarily open to walkers.
  • Footpaths and hiking routes. Footpaths, bridleways, steps and tracks open on foot, then waymarked hiking routes (GR and others) measured apart. A route often follows a path or lane already counted: the two overlap. Paths nobody has mapped are missing.
  • Green space nearby. The share of residents (INSEE’s 200 m grid) within 800 m, as the crow flies, of a mapped park, garden or wood edge. It measures nearness, not a way in. Guadeloupe and French Guiana have no grid: their pages say whether the town center is within 800 m.
  • The coast. The straight-line distance from the town center to OpenStreetMap’s coastline, which follows the tide line into estuaries. A commune is on the coast when the coastline crosses its boundary.
  • No grade yet. U.S. and UK towns have an Outdoors Grade; French towns don’t yet. Each figure is set beside the median of compared communes (those with an overall grade) in the département and in France, each figure its own median.

Questions about the outdoors in Saclay

Is Saclay in a national or regional nature park?

No. The nearest protected area is Haute Vallée de Chevreuse Regional Nature Park, 4.2 km from the town center.

Are there good walks in Saclay?

OpenStreetMap maps 22 km of footpaths and tracks open on foot in the commune, 1.6 km per km² (the median compared town: 1.7 km per km²); 14 km of waymarked hiking routes cross it.

How much of Saclay is woodland?

7.5% of the commune is mapped woodland, private woods included; the median compared French town has 13%.

Is Saclay near the sea?

No: the coast is 153 km from the town center, as the crow flies.

When is the best time for walking in Saclay?

April and June to September: long days, mild highs and little rain, from Météo-France’s 1991–2020 normals at the nearest suitable station.

Why is there no Outdoors Grade for French towns?

TownRatings grades the outdoors in the U.S. and the UK; the French figures are new and not graded yet. This page sets each one beside the median compared French town instead.

Sources: INPN / PatriNat (protected areas 2026, Natura 2000 2024) · © OpenStreetMap contributors, ODbL (paths, hiking routes, woods, coast, gardens) · INSEE, Filosofi 2021 200 m grid (residents) · IGN Admin Express (boundaries) · Météo-France normals 1991–2020 · Medians and percentiles: TownRatings, over compared French towns, updated November 4, 2026. Under the Licence Ouverte / Open Licence 2.0 (Etalab).

Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.