# GRP de la Ceinture Verte, étape 17 : La forêt de Saint-Germain-en-Laye, France: what it is and when to go > GRP de la Ceinture Verte, étape 17 : La forêt de Saint-Germain-en-Laye is a hiking trail in France (Pontoise). Interests: Hiking. The best time to visit is April to October. In June there are 15 h 57 of daylight, and in December, 8 h 03. Here is what it is, where it lies, when to come, how to get there and what else is nearby to turn it into a trip. - Address: https://kokai.app/en/paises/europa/francia/grp-de-la-ceinture-verte-etape-17-la-foret-de-saint-germain/ - Reviewed on: 2026-10-02 - Language: en ## In a nutshell - **What it is:** Hiking trail · Hiking - **Where:** France - **Best time:** April to October. - **Nearest airport:** ORY Paris (Orly, Val-de-Marne), 30 km as the crow flies - **Trail network:** Regional - **Distance:** 15.5 km - **Elevation gain:** +90 m - **From:** Maisons-Laffitte - **To:** Poissy - **Coordinates:** 48.93332, 2.08287 ## What it is and where GRP de la Ceinture Verte, étape 17 : La forêt de Saint-Germain-en-Laye is a hiking trail in France (Pontoise). It is in [Pontoise](https://kokai.app/en/paises/europa/francia/pontoise/), where this site lists 20 more places to see, 13 km from the centre. Its coordinates are 48.93332, 2.08287; the nearest main airport is Paris-Orly Airport (ORY, Paris (Orly, Val-de-Marne)), 30 km as the crow flies. How to get around France (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/europa/francia/#moverse). - [Where it is](https://www.google.com/maps/search/?api=1&query=48.933319%2C2.082874) - [Directions](https://www.google.com/maps/dir/?api=1&destination=48.933319%2C2.082874) - **Trail network:** Regional - **Distance:** 15.5 km - **Elevation gain:** +90 m - **From:** Maisons-Laffitte - **To:** Poissy It is one of the [Hiking](https://kokai.app/en/paises/europa/francia/senderismo/) places in France. In [Kokai](https://kokai.app/en/) it is already on your trip map next to the places you save yourself, and it goes into a day's plan with one tap. ## When to go The best time to visit GRP de la Ceinture Verte, étape 17 : La forêt de Saint-Germain-en-Laye is **April to October**. | Mes | Época | Hours of daylight | | --- | --- | --- | | January | Possible | 8 h 28 | | February | Possible | 9 h 54 | | March | Possible | 11 h 34 | | April | Best time | 13 h 28 | | May | Best time | 15 h 04 | | June | Best time | 15 h 57 | | July | Best time | 15 h 35 | | August | Best time | 14 h 11 | | September | Best time | 12 h 20 | | October | Best time | 10 h 31 | | November | Possible | 8 h 52 | | December | Possible | 8 h 03 | In June there are 15 h 57 of daylight, and in December, 8 h 03. Daylight hours are calculated from the site's latitude for the 15th of each month; when planning a full day on foot they matter as much as the weather. When to go to France in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/europa/francia/#cuando-ir). ## Before you go to France To enter France there are 6 things to sort out before you leave, starting with “Valid ID card (DNI) or passport”: they are all, with their deadlines, in [the France checklist](https://kokai.app/en/paises/europa/francia/#antes-de-salir). Currency: Euro (EUR); plugs: Type C and E · 230 V · 50 Hz; emergencies: 112 · 15 ambulance (SAMU) · 17 police · 18 fire brigade. In [Kokai](https://kokai.app/en/) you tick off the checklist inside your trip, and each item reminds you when it is time to do it. ## What is nearby - [Château du Val](https://kokai.app/en/paises/europa/francia/maison-du-val/): Castle in France · 2.2 km - [Château de Saint-Germain-en-Laye](https://kokai.app/en/paises/europa/francia/chateau-de-saint-germain-en-laye/): Castle housing the national archeology museum near Paris · 4.1 km - [Villa Savoye](https://kokai.app/en/paises/europa/francia/villa-savoye/): Building by Le Corbusier in Poissy (built 1928-31) · 4.1 km - [La P'tite Sœur](https://kokai.app/en/paises/europa/francia/la-p-tite-soeur/): Brewery · 4.9 km - [GRP de la Ceinture Verte, étape 18 : Paysages de vergers et forêt de Marly](https://kokai.app/en/paises/europa/francia/grp-de-la-ceinture-verte-etape-18-paysages-de-vergers-et-for/): Hiking · 5.4 km Distances are as the crow flies. Everything else is in [the France guide](https://kokai.app/en/paises/europa/francia/). ## More in France: Hiking - [Camino de Santiago](https://kokai.app/en/paises/europa/francia/camino-de-santiago/): Catholic pilgrimage to Santiago de Compostela, Spain - [French Way](https://kokai.app/en/paises/europa/francia/camino-frances-01-san-juan-pie-de-puerto-a-logrono/): pilgrims' way, part of Santiago Way - [GR 20](https://kokai.app/en/paises/europa/francia/gr-20/): long distance hiking route in France - [E3 European long distance path](https://kokai.app/en/paises/europa/francia/ruta-europea-caminar-e3/): walking path - [Tour du Mont Blanc](https://kokai.app/en/paises/europa/francia/tour-du-mont-blanc-itineraire-principal/): long distance hiking route in France, Italy and Switzerland - [E9 European long distance path](https://kokai.app/en/paises/europa/francia/european-long-distance-path-e9/): walking path, Europe Every France place under Hiking, each with its season, is on [its page](https://kokai.app/en/paises/europa/francia/senderismo/). ## Frequently asked questions ### What is GRP de la Ceinture Verte, étape 17 : La forêt de Saint-Germain-en-Laye? It is a hiking trail in France. ### When is the best time to visit GRP de la Ceinture Verte, étape 17 : La forêt de Saint-Germain-en-Laye? April to October. In June there are 15 h 57 of daylight, and in December, 8 h 03. ### How do you get to GRP de la Ceinture Verte, étape 17 : La forêt de Saint-Germain-en-Laye? The nearest main airport is Paris-Orly Airport (ORY), 30 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=48.933319%2C2.082874) opens the route on the map, and how to get around France is explained in [its country guide](https://kokai.app/en/paises/europa/francia/#moverse). ### How do I add it to my trip? With one tap. In Kokai it is already on the France map, next to the places you save yourself: add it to a day's plan, give it a time and, if you like, get a reminder when you pass nearby. ### What else is around here? Nearby you have [Château du Val](https://kokai.app/en/paises/europa/francia/maison-du-val/), [Château de Saint-Germain-en-Laye](https://kokai.app/en/paises/europa/francia/chateau-de-saint-germain-en-laye/), [Villa Savoye](https://kokai.app/en/paises/europa/francia/villa-savoye/). The rest is in [the France guide](https://kokai.app/en/paises/europa/francia/). Data from [OpenStreetMap](https://www.openstreetmap.org/relation/17380698), licensed under the ODbL. Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).