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Routes
Bike touring routes & trails
France
Hauts-De-France
Abbeville
Mers-Les-Bains

Cliffs of Ault and Bois de Cise Loop

Moderate

4.0

(40)

101

riders

Cliffs of Ault and Bois de Cise Loop

01:36

24.2km

210m

Cycling

Cycle a moderate 15.0-mile loop from Mers-les-Bains to the dramatic Cliffs of Ault, enjoying Belle Époque architecture and coastal views.

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc naturel régional Baie de Somme Picardie Maritime

Waypoints

A

Start point

Parking

Get Directions

1

760 m

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 links Mers-Les-Bains to Paris, exclusive tourism from Paris is booming. It was very …

Translated by Google •

Tip by

2

1.46 km

At the end of the beach and the beach cabins you are at the foot of the cliffs.

Translated by Google •

Tip by

3

8.80 km

Ault viewpoint

Highlight • Viewpoint

Panorama point indicated on the map just before you enter Ault and on the Mont aux cailloux.

Translated by Google •

Tip by

4

9.97 km

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.

Tip by

5

19.9 km

Castle Park

Highlight • Castle

The castle offers a beautiful view of the 15 ha park, which is planted with beeches, including one from 1585, the Guisard*, which is protected as a 'special tree'. Visitors …

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B

24.2 km

End point

Parking

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Way Types & Surfaces

Way Types

11.7 km

5.57 km

3.93 km

2.54 km

199 m

121 m

111 m

Surfaces

15.0 km

4.55 km

2.53 km

2.07 km

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Elevation

Elevation

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

Highest point (100 m)

Lowest point (0 m)

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Weather

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Sunday 17 May

14°C

8°C

37 %

Additional weather tips

Max wind speed: 17.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the terrain like for cycling this loop?

This 24.2 km loop is categorized as a moderate bike ride with about 215 meters of elevation gain, indicating some inclines. While significant portions are paved (asphalt), the route also includes unpaved sections and paths. Touring cyclists should be prepared for varied surfaces, and some unpaved segments might be challenging, potentially requiring you to push your bike.

What can I see along the route?

The loop offers diverse scenery. You'll pass the distinctive Belle Époque houses of Mers-les-Bains, enjoy views from the Beach and cliffs of Mers-les-Bains, and experience the dramatic chalky cliffs stretching beyond Ault. Don't miss the Ault viewpoint and the Eastern end of Falaises d'Albâtre, Ault coastal panorama. The route also takes you through the expansive maritime plain known as "les Bas Champs" and past the Castle Park.

Where can I park to start this cycling route?

While specific parking lots are not detailed, Mers-les-Bains is the starting and ending point for this loop. You should be able to find parking within the town to access the route. For more detailed information on parking options in Mers-les-Bains, you might check local tourism resources like somme-tourisme.com.

Is this cycling loop suitable for families or beginners?

This 24.2 km loop is rated as 'moderate' and requires good fitness, making it most suitable for touring cyclists comfortable with varied terrain. While some sections are paved, there are unpaved paths that might be difficult for less experienced riders or those with children, potentially requiring them to push their bikes. It's not typically recommended as a beginner-friendly or easy family ride.

What is the best time of year to cycle this route?

The Baie de Somme region, including the cliffs of Ault, is beautiful in spring, summer, and early autumn. These seasons generally offer more favorable weather for cycling and enjoying the coastal views and natural park. Always check the local weather forecast before you go.

Are dogs allowed on this cycling trail?

The trail passes through the Baie de Somme Picardie Maritime Regional Natural Park and along coastal areas. While specific regulations for dogs on cycling trails are not provided, it's generally advisable to keep dogs on a leash, especially in natural park areas to protect wildlife and ensure safety for all users. Always check local signage for specific rules.

Do I need any permits or pay entrance fees for this route or the natural park?

Cycling this loop, which is located within the Parc naturel régional Baie de Somme Picardie Maritime, does not typically require specific permits or entrance fees for general access. However, always respect local regulations and private property. For any specific events or protected areas, it's wise to consult the park's official website or local tourism offices like somme-tourisme.com for the latest information.

Does this trail intersect with other cycling routes?

Yes, this route is part of a larger cycling network. It intersects with sections of the EV4 France, Circuit De Lamotte, Sentier du Littoral, Chemin des Étangs, and Chemin entre Verre et Mer. The Baie de Somme area boasts 160 km of signposted routes across 9 loops, and 44 km of cycle paths on the Vélomaritime (EuroVelo 4), offering possibilities for extending your ride.

What kind of wildlife can I expect to see in the Baie de Somme Picardie Maritime Regional Natural Park?

The Baie de Somme Picardie Maritime Regional Natural Park is known for its rich biodiversity. You might spot migratory birds, especially in the wetlands and marshes, and even harbor seals along the coast. The diverse landscape of wetlands, dunes, and woodlands supports a variety of flora and fauna.

Are there places to eat or drink along the route?

The loop starts and ends in Mers-les-Bains, where you'll find various cafes, restaurants, and shops. As you cycle along the coast towards Ault, there may be fewer options, so it's a good idea to plan your stops or carry snacks and water, especially for the sections between towns.

How long does it typically take to complete this cycling loop?

The estimated duration for this 24.2 km touring bicycle loop is approximately 1 hour and 36 minutes (5763 seconds). However, this can vary depending on your cycling speed, fitness level, and how often you stop to enjoy the viewpoints and scenery.

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