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Routes
Bike touring routes & trails
France
Hauts-De-France
Boulogne-Sur-Mer
Audresselles

Slack Estuary – Fort d'Ambleteuse loop from Audresselles

Routes
Bike touring routes & trails
France
Hauts-De-France
Boulogne-Sur-Mer
Audresselles

Slack Estuary – Fort d'Ambleteuse loop from Audresselles

Easy

4.5

(2)

18

riders

Slack Estuary – Fort d'Ambleteuse loop from Audresselles

00:31

8.30km

60m

Cycling

Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: August 16, 2026

Tips

Includes a segment in which cycling is not permitted

After 4.72 km for 59 m

Waypoints

A

Start point

Parking

Get Directions

1

103 m

Opal Coast

Highlight • Other

Street

Showing Translation

Tip by

3

3.09 km

Slack Estuary

Highlight • Other

It is a small coastal river that flows into the sea, near the fortress of Ambleteuse.
Although the Slack is modest today, it was much more imposing in the past, …

Translated by Google •

Tip by

4

3.19 km

Fort d'Ambleteuse

Highlight • Historical Site

This fort is the only one left of the seven that defended the coast of Boulogne.
In 169, the English king James II, chased away by his subjects, came ashore …

Translated by Google •

Tip by

5

3.54 km

Saint Peter's Chapel

Highlight • Other

The chapel is dedicated to Saint Peter, the first abbot of Canterbury, who drowned in the straits and whose body was found on the beach at Ambleteuse in 608.

Translated by Google •

Tip by

6

4.51 km

Slack River Path

Highlight • Trail

The long slack

Translated by Google •

Tip by

7

4.56 km

La Slack Lock

Highlight • Other

The Slack is a small coastal river, which flows into the sea, near Fort Ambleteuse.
Although modest today, the Slack was much more imposing in the past, when the gravel …

Translated by Google •

Tip by

8

5.87 km

Ambleteuse

Highlight • Settlement

B

8.30 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

2.53 km

2.36 km

1.58 km

1.04 km

514 m

238 m

< 100 m

Surfaces

4.98 km

2.48 km

494 m

151 m

147 m

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Elevation

Elevation

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

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Weather

Powered by Foreca

Wednesday 2 September

20°C

18°C

26 %

Additional weather tips

Max wind speed: 42.0 km/h

to get more detailed weather forecasts along your route

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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