GR France. Long Hiking Trails. Long Distance Footpaths

Hike on the GR®800 along Somme river through Aisne and Somme department from Fonsomme to Saint-Valery-sur-Somme via Saint Quentin, Seracourt le Grand, Ham, Falvy, Peronne, Cappy, Corbie, Amiens, Picquigny, Long and Abbeville. Guest House, Bed and Breakfast, Hotel, Camping, Shelter, Inn, Shops.

GR®800 Sentier de la Somme De Fonsomme (Aisne) à St-Valery-sur-Somme (Somme)


Long Hiking Trails / Long Distance Footpaths


Somme river trail

From Fonsomme (Aisne) to St-Valery-sur-Somme (Somme)


The Somme is a river that is 245 km long, which flows through the departments of Aisne and Somme in Picardy, northern France. It originates from the heights of the ancient Arrouaise forest in Fonsomme near Saint-Quentin and flows into the Bay of Somme, in the English Channel. The Somme is a typical chalk stream characterized by a very low gradient, slow waters, and a regular flow fed by uninterrupted seepage. The river passes through several towns and villages such as Amiens, Abbeville, and Saint-Valery-sur-Somme. It is also known for the Battle of the Somme that took place during World War I. The GR®800 is a hiking trail that follows the river as closely as possible from its source in Fonsomme to its meeting with the sea in the Bay of Somme. It runs through the valley of the Somme, called Samara in Roman times.

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GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 1


GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 2


GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 3GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 4GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 5GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 6GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 7

GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 9
© GPX Private use only

Distance: 225km, Elevation maximum: 133m, Elevation minimum: 4m, Elevation gain uphill: 946m





Accommodation GR GRP


Accommodation or business owner on or near a GR®, you can appear on GR-INFOS

For your registration, you can send me by email ( your address and phone number, your website (Facebook page), a brief description with 5 beautiful photos of your establishment.

Registration price : € 100 per GR® or GRP® for 5 years. Renewable.


GR®800 Hiking from Fonsomme (Aisne) to St-Valery-sur-Somme (Somme) 10

GR®800 Somme river trail
From Fonsomme (Aisne) to Chipilly (Somme)
From Chipilly to St-Valery-sur-Somme (Somme)

Nearby paths:
GR®21 Cliff trail
GR®120 Coastal Trail
GR®122 From Bon-Secours (Belgium) to Son (Ardennes)
GR®123 From Contes (Pas-de-Calais) to Carlepont (Oise)
GR®124 From Cires-les-Mello (Oise) to Rebreuviette (Pas-de-Calais)
GR®125 From La Cressonniere (Val-d'Oise) to St Valery-sur-Somme (Somme)
GR®145 Via Francigena
GR®655 Via Turonensis


Mon GRIt is advisable to follow the beacons all along your hike and to bring you the FFRandonnee topo-guide. You will also find information on

GR®, PR®, GRP®, and the corresponding signs of markings (white / red, yellow and yellow / red) are trademarks of the French Federation of Hiking. They may not be reproduced without permission. The French Federation of Hiking, state-approved, includes organizations that create and maintain hiking routes on GR®, PR® and GRP®. It publishes guides these topo hiking routes.

With your donations, support the actions of the thousands of volunteer markers of the FFRandonnee. is an editorial partner of

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L'Etoile Guest-House

Old romantic Hotel, L'Etoile Guest-House is a mountain retreat in the South of France. With a beautiful park along the Allier River, L'Etoile Guesthouse is located in La Bastide-Puylaurent between Lozere, Ardeche and Cevennes. Many hiking trails like GR®7, GR®70 Stevenson trail, GR®72, GR®700 Regordane way, Cevenol, GR®470 Allier River Springs and Gorges, Margeride, Ardechoise. Many hiking loops. The right place to relax.

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