4.3
(1012)
6,201
riders
239
rides
Touring cycling routes around Mers-Les-Bains traverse a coastline characterized by dramatic cliffs and Belle Époque architecture. The region features diverse landscapes, including the low fields of the Hâble d'Ault and the valleys of the Bresle. These routes offer varied terrain, from coastal paths to inland trails, suitable for different cycling preferences. The area provides access to a network of cycling routes that highlight both natural features and historical sites.
Last updated: July 7, 2026
4.3
(43)
204
riders
50.6km
03:11
480m
480m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.0
(47)
116
riders
24.2km
01:36
210m
210m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.8
(13)
46
riders
38.7km
02:29
380m
380m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.5
(55)
321
riders
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.6
(17)
156
riders
70.7km
04:33
380m
380m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Beautiful views, a magnificent environment, a good electric bike with around 65NM is desirable, or a tough cyclist.
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Hourdel Lighthouse is a lighthouse on the common Cayeux-sur-Mer, it is built on the south side of the Bay of Somme, at the end of the point of Hourdel.
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The cliffs are made of chalk and are impressive to look at.
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Here in Ault begin the chalk cliffs, which stretch all the way to Normandy and repeatedly appear as enormous cliffs.
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The cliffs around the beach of Ault are composed of chalk from the Upper Cretaceous, more precisely from the Turonian and Coniacian (around 83 million years ago to 90 million years ago). They are strewn with flint nodules which highlight the subhorizontal stratification planes (the formation of flint has already been discussed in Discovery of the geology of the cliffs of Étretat, presentation of an excursion from the beach of Tilleul (Antifer) to the Porte d'Amont (Étretat Nord)). The relative proportion of chalk and flint is around 90-95% chalk to 5-10% flint. Flint horizons are stratigraphic markers. On the cliffs of Ault, the regular flint band called Seven Sisters is recognizable and characterizes the boundary between the Middle Coniacian and the Upper Coniacian (around 87 million years ago). The boundary between the lower and middle Coniacian is marked by the Shoreham 2 marl level, which is more difficult to identify. These lithostratigraphic markings allow in particular the correlation of distant deposits, such as between the Normandy and Picardy coasts, or between the French and English coasts.
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The cliffs around the beach of Ault are composed of chalk from the Upper Cretaceous, more precisely from the Turonian and Coniacian (around 83 million years ago to 90 million years ago). They are strewn with flint nodules which highlight the subhorizontal stratification planes (the formation of flint has already been discussed in Discovery of the geology of the cliffs of Étretat, presentation of an excursion from the beach of Tilleul (Antifer) to the Porte d'Amont (Étretat Nord)). The relative proportion of chalk and flint is around 90-95% chalk to 5-10% flint. Flint horizons are stratigraphic markers. On the cliffs of Ault, the regular flint band called Seven Sisters is recognizable and characterizes the boundary between the Middle Coniacian and the Upper Coniacian (around 87 million years ago). The boundary between the lower and middle Coniacian is marked by the Shoreham 2 marl level, which is more difficult to identify. These lithostratigraphic markings allow in particular the correlation of distant deposits, such as between the Normandy and Picardy coasts, or between the French and English coasts.
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Ault is a beautiful place. Beautifully laid out paths above and below the impressive cliffs. The town center is perfect for relaxing. There are a few cafes and bistros for when you get a little hungry. There are benches everywhere where you can sit and enjoy a few minutes of peace and the wonderful views.
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There are over 220 touring cycling routes in the Mers-les-Bains area, offering a wide variety of options for different skill levels and preferences. The komoot community has explored these routes over 5,000 times.
The routes around Mers-les-Bains cater to various fitness levels. You'll find approximately 68 easy routes, 117 moderate routes, and 39 more challenging routes, ensuring there's something for every touring cyclist.
Yes, Mers-les-Bains is a significant point on La Vélomaritime (EuroVelo 4), a major European cycling route. This route allows you to explore the coastline from the Somme to the Baie de Somme, offering picturesque journeys like the 22 km stretch to Cayeux-sur-Mer or the 77 km route to Fort-Mahon-Plage. A longer local option is the Cliffs – View over the cliffs loop from Le Tréport - Mers-les-Bains, which covers over 110 km.
Yes, many routes are designed as loops. For example, the Cliffs of Ault and Bois de Cise Loop is a moderate 24.2 km path offering views of dramatic cliffs and Belle Époque architecture. Another option is The cliffs of Criel by the château d'Eu — loop from Eu, a 38.7 km trail through coastal cliffs and historical areas.
Absolutely. Many routes are suitable for families and beginners, especially those on paved surfaces. The "Chemin Entre Verre et Mer" (formerly "Chemin des Etangs") is an 18 km route along the Bresle Valley, accessible for cyclists, pedestrians, and individuals with reduced mobility, offering scenic views of ponds. The Cycle route from Le Tréport to Eu – Le Tréport loop from Le Tréport is another easy option at just under 10 km.
The region is renowned for its dramatic coastal landscapes. You can enjoy stunning panoramic views from the Ault Chalk Cliffs and La Cise Cliff. Inland, the Hâble d'Ault, an ancient lagoon, is a haven for bird species, offering a unique ecological attraction. Don't miss the charming Bois de Cise with its Art Deco heritage.
Mers-les-Bains itself is famous for its unique and colorful Belle Époque houses and beachfronts, adding a cultural dimension to your ride. The town, along with neighboring Le Tréport, is considered a 'jewel' of this architectural era. You can also visit Saint Martin's Church.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 800 reviews. Cyclists often praise the dramatic coastal cliffs, the distinctive Belle Époque architecture, and the diverse landscapes that combine coastal paths with tranquil inland trails.
Yes, the Seaside Cycle Route: Cliffs of Criel Loop is a 50.6 km trail specifically designed to showcase the impressive coastal cliffs around Criel. The Cliffs of Ault and Bois de Cise Loop also offers stunning cliff views.
The region offers pleasant cycling conditions throughout much of the year. Spring and autumn generally provide milder temperatures and fewer crowds, ideal for exploring the coastal and inland routes. Summer is also popular, though coastal areas can be busier.
While specific information on bike-friendly public transport options directly to Mers-les-Bains is limited, the town's connection to major cycling networks like La Vélomaritime suggests a growing infrastructure for cyclists. It's advisable to check with local transport providers for their current policies on carrying bicycles.
To find less crowded routes, consider exploring the inland trails, such as those along the Bresle Valley, like the "Chemin Entre Verre et Mer." These often offer a more tranquil experience compared to the popular coastal sections of La Vélomaritime, especially during peak season.


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