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Bike touring routes & trails

South coast loop of the Baie de Somme

Routes

Bike touring routes & trails

South coast loop of the Baie de Somme

Moderate

4.5

(11)

riders

South coast loop of the Baie de Somme

03:49

56.9km

300m

Cycling

Among the natural jewels of Hauts-de-France, the Bay of Somme needs no further introduction. Its ornithological richness and marsh landscapes have long made it famous. This route sets off to help you discover its entire southern coast.

Starting from Le Hourdel, famous for its point that juts into the bay,…

by Hauts-de-France Tourisme

Last updated: May 28, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc naturel régional Baie de Somme Picardie Maritime

Waypoints

Start point

Parking

Get Directions

833 m

Blockhouse of Hourdel

Highlight • Structure

The bunker's slanted position in the water impressively shows how the coastline has developed over the decades. Only at low tide can you still reach the bunker with dry feet. …

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866 m

White route of the Bay of Somme

Highlight (Segment) • Cycleway

This trail runs along the coast, always staying close to the beach, with several access opportunities and a rich diversity of fauna (seals, birds...).

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7.93 km

Coastal path from Ault to Cayeux-sur-Mer

Highlight (Segment) • Cycleway

Good bikeable gravel road with a couple rough sections stretching for miles between the coastal dam and the wetlands of the nature preserve, with excellent observation opportunities of birds and other wildlife.

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16.4 km

Ault Coastal Panorama

Highlight • Viewpoint

Fantastic viewpoint, with orientation table and benches with spectacular perspective. Steep bike/pedestrian road, closed to cars as the cliffs are crumbling and the edge advances closer to the village.

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26.1 km

Belle Époque Houses of Mers-les-Bains

Highlight • Historical Site

The seaside district: after the construction of the railway at the end of the 19th century, which connects Mers-Les-Bains to Paris, exclusive tourism from Paris is booming. It was very …

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56.8 km

Beach and tip of Hourdel

Highlight • Beach

The pebble beach sometimes hosts seals and offers views of the lighthouse and the marshes.

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56.9 km

End point

Parking

Way Types & Surfaces

Way Types

20.6 km

15.6 km

10.2 km

10.0 km

368 m

< 100 m

Surfaces

31.5 km

11.5 km

8.72 km

3.96 km

1.15 km

178 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (110 m)

Lowest point (0 m)

Weather

Friday 10 July

32°C

18°C

0 %

Additional weather tips

Max wind speed: 22.0 km/h

to get more detailed weather forecasts along your route

Comments

May 21, 2026

Among the natural jewels of Hauts-de-France, the Bay of Somme needs no further introduction. Its ornithological richness and marsh landscapes have long made it famous. This route sets off to help you discover its entire southern coast.
﻿
Starting from Le Hourdel, famous for its point that juts into the

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South coast loop of the Baie de Somme

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South coast loop of the Baie de Somme

Blockhouse of Hourdel

White route of the Bay of Somme

Coastal path from Ault to Cayeux-sur-Mer

Ault Coastal Panorama

Belle Époque Houses of Mers-les-Bains

Beach and tip of Hourdel

Nearby routes

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