Photo: VVVCFFrance · CC0Almost 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.
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 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.
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.
Percentiles among compared French towns; ties count half.
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.
From Cap-d'Ail (10.8 km per km²) to Bastelicaccia (0 km per km²).
Every town in the comparison
| Town | Paths (km/km²) | Woodland | Protected | Coast | |
|---|---|---|---|---|---|
| 1 | Cap-d'Ail Alpes-Maritimes | 10.8 | 7.8% | 0.2% | On it |
| 2 | Royat Puy-de-Dôme | 4.2 | 63% | 0.2% | 257 km |
| 3 | Labège Haute-Garonne | 3.9 | 6.5% | 0% | 137 km |
| 4 | Valras-Plage Hérault | 3.8 | 0% | 26% | On it |
| 5 | Nozay Essonne | 3.2 | 5.7% | 0% | 162 km |
| 6 | Maurecourt Yvelines | 3.2 | 15% | 0% | 125 km |
| 7 | La Chaussée-Saint-Victor Loir-et-Cher | 3 | 11% | 8.1% | 215 km |
| 8 | Montrabé Haute-Garonne | 3 | 6.6% | 0% | 142 km |
| 9 | Thourotte Oise | 2.8 | 8% | 0.8% | 116 km |
| 10 | Haisnes Pas-de-Calais | 2.7 | 3.2% | 0% | 67 km |
| 11 | Écrouves Meurthe-et-Moselle | 2.6 | 23% | 100% | 346 km |
| 12 | Provin Nord | 2.4 | 4.7% | 0% | 69 km |
| 13 | Villeneuve-de-la-Raho Pyrénées-Orientales | 2.2 | 0.2% | 0% | 9.8 km |
| 14 | Vinon-sur-Verdon Var | 2.1 | 34% | 100% | 57 km |
| 15 | Serres-Castet Pyrénées-Atlantiques | 1.9 | 8.9% | 0% | 92 km |
| 16 | Ornans Doubs | 1.8 | 66% | 92% | 384 km |
| 17 | Rousson Gard | 1.8 | 28% | 0% | 70 km |
| 18 | Capdenac-Gare Aveyron | 1.7 | 28% | 0% | 177 km |
| 19 | Saclay Essonne | 1.6 | 7.5% | 0% | 153 km |
| 20 | La Tour-d'Aigues Vaucluse | 1.5 | 24% | 100% | 45 km |
| 21 | Chazay-d'Azergues Rhône | 1.3 | 11% | 0% | 262 km |
| 22 | Craon Mayenne | 1.1 | 1.4% | 0% | 92 km |
| 23 | Vinay Isère | 1.1 | 26% | 0% | 200 km |
| 24 | Morigny-Champigny Essonne | 0.9 | 22% | 0.4% | 173 km |
| 25 | Sierentz Haut-Rhin | 0.9 | 39% | 36% | 430 km |
| 26 | Hergnies Nord | 0.9 | 8.5% | 100% | 94 km |
| 27 | Guignes Seine-et-Marne | 0.9 | 36% | 0% | 189 km |
| 28 | Hesdin-la-Forêt Pas-de-Calais | 0.9 | 51% | 0% | 28 km |
| 29 | Villemoustaussou Aude | 0.8 | 4.8% | 0% | 63 km |
| 30 | Truchtersheim Bas-Rhin | 0.8 | 1.2% | 0% | 438 km |
| 31 | Marckolsheim Bas-Rhin | 0.8 | 37% | 47% | 475 km |
| 32 | Chancelade Dordogne | 0.7 | 48% | 0% | 100 km |
| 33 | Ghisonaccia Haute-Corse | 0.6 | 11% | 15% | On it |
| 34 | Millas Pyrénées-Orientales | 0.5 | 3.2% | 0.1% | 28 km |
| 35 | Montbeton Tarn-et-Garonne | 0.4 | 8% | 0% | 180 km |
| 36 | Torigny-les-Villes Manche | 0.3 | 5.4% | 0% | 38 km |
| 37 | Angerville Essonne | 0.3 | 3.4% | 0% | 174 km |
| 38 | Miniac-Morvan Ille-et-Vilaine | 0.2 | 16% | 100% | 3.2 km |
| 39 | Mesnil-en-Ouche Eure | 0.2 | 13% | 0.4% | 55 km |
| 40 | Marans Charente-Maritime | 0.2 | 0.3% | 100% | 11 km |
| 41 | Bastelicaccia Corse-du-Sud | 0 | 15% | 0.2% | 4.2 km |
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.
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.
Bois du Chat Noir
Bois de Corbeville
Bois des Linots
Forêt Départementale des Bois Chauveaux
Forêt domaniale de Versailles
Parcelle 6
Parcelle 10
All 13 named parks, gardens and woods
Source: © OpenStreetMap contributors (ODbL): named parks, gardens and woods; sizes are the whole site.
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.
Haute Vallée de Chevreuse Regional Nature Park
Share of the commune’s land
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.
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.
Km per km² of the commune · mapped on OpenStreetMap
Share of the land · mapped woods and forest
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
+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).
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 8.7 | 10.1 | 11.7 | 13.6 | 15.2 | 16.1 | 15.8 | 14.3 | 12.5 | 10.7 | 9.1 | 8.3 |
| High (°C) | 7 | 8 | 12 | 16 | 19 | 23 | 25 | 25 | 21 | 16 | 10 | 7 |
| Rain (mm) | 55 | 47 | 50 | 50 | 68 | 55 | 53 | 58 | 52 | 61 | 61 | 66 |
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 →
Next to Saclay
The nearest towns of 2,500 or more, colored by the share of their land in protected areas.
| Town | Protected | Woodland | Paths (km/km²) |
|---|---|---|---|
| Saclay | 0% | 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.
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.