First pick
Parc de Grouchy
Park or garden
43 ha8.1 km of path
1 h 50 minto walk all 8.1 km of path
Centralin the middle of Osny
Directionsto a point inside
Photo: P.poschadel · CC BY-SA 3.014%woodland
Outdoors in Osny · protected areas, woods and footpaths
Almost every home in Osny is within 800 m of a park or wood
39 km of footpaths cross Osny (3.2 km per km²). No protected area reaches Osny; the nearest, Vexin Français Regional Nature Park, is 1.9 km from the town center. Osny has 2 km of waymarked hiking routes. France has no Outdoors Grade yet: these are the figures, each beside the compared towns’ median.
Protected areas
0.1%
of the commune’s land
Nearest: Vexin Français Regional Nature Park, 1.9 km
Woodland
14%
of the land, mapped on OpenStreetMap
Compared town: 13%
Footpaths
39 km
3.2 km per km²
Compared town: 1.7 km per km²
Hiking routes
1.8 km
waymarked, GR and others
Compared town: 0.3 km per km²
Parks & woods
6
named, in or within 400 m of the commune
First: Parc de Grouchy
Throughout this page, the Val-d'Oise 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 Osny?
Read from the data: what stands out first, good and less good.
A place of footpaths3.2 km per km² of mapped footpath, against 1.7 km per km² for the median compared town.Protected land nearbyVexin Français Regional Nature Park is 1.9 km from the town center.
What sets Osny apart: its footpaths, then protected land close by.
Against French towns
How Osny 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 areas0.1%Share of the land in a national park, regional nature park, nature reserve or Natura 2000 site
49out of 100
Woodland14%Share of the land mapped as forest or woods on OpenStreetMap
52out of 100
Footpaths3.2 km per km²Km of mapped footpath and track open on foot, per km² of the commune
76out of 100
Hiking routes0.1 km per km²Km of waymarked hiking routes (GR and others), per km² of the commune
33out of 100
Percentiles among compared French towns; ties count half.
Towns its size
Osny has the 19th most footpaths per km² of 41 towns its size
The 40 compared French towns nearest in population (17,325 to 18,582 residents), by km of footpath per km². Hover for each one’s protected land and woods; click for its page.
From Jouy-le-Moutier (10.3 km per km²) to Marmande (0.3 km per km²).
Every town in the comparison
| Town | Paths (km/km²) | Woodland | Protected | Coast | |
|---|---|---|---|---|---|
| 1 | Jouy-le-Moutier Val-d'Oise | 10.3 | 23% | 0% | 123 km |
| 2 | Saint-Égrève Isère | 5.8 | 22% | 30% | 208 km |
| 3 | Bonneuil-sur-Marne Val-de-Marne | 5.8 | 3.6% | 0% | 163 km |
| 4 | L'Isle-d'Abeau Isère | 5.2 | 9.8% | 0% | 242 km |
| 5 | Floirac Gironde | 5.1 | 16% | 2.6% | 19 km |
| 6 | Bischheim Bas-Rhin | 5.1 | 3.6% | 0.6% | 449 km |
| 7 | Villeneuve-Loubet Alpes-Maritimes | 5 | 30% | 16% | On it |
| 8 | Boissy-Saint-Léger Val-de-Marne | 4.4 | 50% | 0% | 166 km |
| 9 | Balma Haute-Garonne | 4.2 | 6.4% | 0% | 142 km |
| 10 | Éragny-sur-Oise Val-d'Oise | 4.1 | 15% | 0% | 124 km |
| 11 | Chamalières Puy-de-Dôme | 4.1 | 3.4% | 0.1% | 258 km |
| 12 | Moissy-Cramayel Seine-et-Marne | 3.9 | 4.7% | 0% | 180 km |
| 13 | Écully Rhône | 3.8 | 14% | 0% | 253 km |
| 14 | Garches Hauts-de-Seine | 3.7 | 2.5% | 0% | 144 km |
| 15 | Bry-sur-Marne Val-de-Marne | 3.6 | 7% | 0% | 158 km |
| 16 | Cognac Charente | 3.5 | 13% | 17% | 43 km |
| 17 | Avion Pas-de-Calais | 3.4 | 13% | 0% | 77 km |
| 18 | Hendaye Pyrénées-Atlantiques | 3.4 | 8% | 26% | On it |
| 19 | Osny Val-d'Oise | 3.2 | 14% | 0.1% | 119 km |
| 20 | Hem Nord | 3 | 5.1% | 0% | 64 km |
| 21 | Le Puy-en-Velay Haute-Loire | 2.9 | 12% | 0% | 165 km |
| 22 | Le Pontet Vaucluse | 2.9 | 2.8% | 3.4% | 56 km |
| 23 | Cluses Haute-Savoie | 2.8 | 33% | 0% | 264 km |
| 24 | Yutz Moselle | 2.6 | 18% | 0% | 310 km |
| 25 | Soisy-sous-Montmorency Val-d'Oise | 2.6 | 5% | 0% | 135 km |
| 26 | Carvin Pas-de-Calais | 2.5 | 5.3% | 0% | 73 km |
| 27 | Digne-les-Bains Alpes-de-Haute-Provence | 2.5 | 50% | 4% | 85 km |
| 28 | Pontarlier Doubs | 2.4 | 48% | 0% | 359 km |
| 29 | Sanary-sur-Mer Var | 2.2 | 16% | 0% | On it |
| 30 | Lattes Hérault | 2.2 | 0.8% | 22% | 5.5 km |
| 31 | Lunéville Meurthe-et-Moselle | 2.1 | 9% | 0.1% | 389 km |
| 32 | Limay Yvelines | 2.1 | 16% | 6.1% | 112 km |
| 33 | Châteauneuf-les-Martigues Bouches-du-Rhône | 2 | 17% | 27% | 6 km |
| 34 | Bagnols-sur-Cèze Gard | 1.6 | 27% | 8.2% | 79 km |
| 35 | Saint-Maximin-la-Sainte-Baume Var | 1 | 41% | 34% | 33 km |
| 36 | Brignoles Var | 0.9 | 48% | 17% | 34 km |
| 37 | Romorantin-Lanthenay Loir-et-Cher | 0.8 | 30% | 100% | 249 km |
| 38 | Vire Normandie Calvados | 0.6 | 3.9% | 0% | 41 km |
| 39 | Segré-en-Anjou Bleu Maine-et-Loire | 0.5 | 4.6% | 0% | 108 km |
| 40 | Ambarès-et-Lagrave Gironde | 0.4 | 4.8% | 35% | 11 km |
| 41 | Marmande Lot-et-Garonne | 0.3 | 11% | 4% | 82 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.
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 Osny
Named parks, gardens and woods in the commune or within 400 m, the biggest and best-pathed first: Parc de Grouchy leads, at 43 ha. Directions go to a point inside.
La Garenne
Wood or forest
54 ha4.3 km of path
55 minto walk all 4.3 km of path
0.6 km northfrom the center
Directionsto a point inside
Bois Dame Jeanne
Wood or forest
44 ha1.1 km of path
15 minto walk all 1.1 km of path
3.1 km north-eastfrom the center
Directionsto a point inside
Forêt Départementale de Grouchy
Wood or forest
18 ha3.6 km of path
50 minto walk all 3.6 km of path
0.7 km westfrom the center
Directionsto a point inside
Parc des Arènes
Park or garden · 400 m outside the commune
4 ha
1.5 km south-westfrom the center
Directionsto a point inside
Parc des sciences
Park or garden · 10 m outside the commune
1.4 ha0.9 km of path
10 minto walk all 0.9 km of path
2 km south-westfrom the center
Allée des Cascades
Directionsto a point inside
Source: © OpenStreetMap contributors (ODbL): named parks, gardens and woods; sizes are the whole site.
Protected areas
Vexin Français Regional Nature Park is the nearest protected area, 1.9 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
Vexin Français Regional Nature Park
1.9 km from the town center
Share of the commune’s land
Any protected area0.1%
Regional nature park0.1%
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.
A regional nature park is a charter between communes to look after a landscape: farming, building and hunting go on inside it.
Source: INPN / PatriNat, protected areas July 2026, Natura 2000 December 2024; shares of IGN’s commune boundary.
Footpaths and woods
39 km of footpaths cross Osny
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
39 km
3.2 km per km²
Hiking routes
1.8 km
waymarked: 0.1 km per km²
Woodland
14%
about 1.8 km² of mapped woods
Km per km² of the commune · mapped on OpenStreetMap
OsnyVal-d'Oise medianFrance median
Footpaths3.2
Hiking routes0.1
02.55 km per km²
Share of the land · mapped woods and forest
OsnyVal-d'Oise medianFrance median
Woodland14%
0%50%100%
That is more than in 76% of compared French towns for footpaths per km², and for woodland more than in 52% 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 Osny is within 800 m of a mapped park or wood, as in most French towns.
2 named hiking routes within 2 km
PR (local walk)Other named walk
PR B024.1 km
Le Fil d'Ariane9.6 km
Source: © OpenStreetMap contributors (ODbL), extracts of October 25, 2026 (Geofabrik).
When to get out
The best walking months in Osny: April to September
Météo-France’s 1991–2020 normals at Pontoise -Ville, 2.5 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) | 8.6 | 10.1 | 11.7 | 13.6 | 15.3 | 16.2 | 15.8 | 14.4 | 12.5 | 10.7 | 9.0 | 8.2 |
| High (°C) | 8 | 9 | 13 | 17 | 21 | 24 | 26 | 26 | 22 | 17 | 12 | 8 |
| Rain (mm) | 58 | 52 | 49 | 45 | 62 | 54 | 49 | 53 | 46 | 64 | 59 | 75 |
April is the driest month (45 mm) and August the warmest (highs of 26 °C). 75 mm of rain falls in December, the wettest month. Frost comes on about 35 nights a year. The climate in Osny →
Neighbors
Next to Osny
The nearest towns of 2,500 or more, colored by the share of their land in protected areas.
PontoiseCergySaint-Ouen-l'AumôneCourdimancheVauréalÉragny-sur-OiseOsny
Under 1%1–10 %10–25 %25–50 %50 %+
| Town | Protected | Woodland | Paths (km/km²) |
|---|---|---|---|
| Osny | 0.1% | 14% | 3.2 |
| Pontoise 31,970 · 2.4 km | 0.5% | 11% | 6.2 |
| Cergy 70,906 · 2.5 km | 0% | 13% | 11.2 |
| Saint-Ouen-l'Aumône 25,578 · 4.4 km | 0% | 7.4% | 3.2 |
| Courdimanche 7,311 · 4.9 km | 0% | 17% | 3 |
| Vauréal 16,079 · 5 km | 0% | 19% | 12.3 |
| Éragny-sur-Oise 18,436 · 5.5 km | 0% | 15% | 4.1 |
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 Osny
Is Osny in a national or regional nature park?
No. The nearest protected area is Vexin Français Regional Nature Park, 1.9 km from the town center.
Are there good walks in Osny?
OpenStreetMap maps 39 km of footpaths and tracks open on foot in the commune, 3.2 km per km² (the median compared town: 1.7 km per km²); 2 km of waymarked hiking routes cross it.
How much of Osny is woodland?
14% of the commune is mapped woodland, private woods included; the median compared French town has 13%.
Is Osny near the sea?
No: the coast is 119 km from the town center, as the crow flies.
When is the best time for walking in Osny?
April 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.