The Marais Audomarois is a large wetland of canals, market gardens and reed beds near Saint-Omer, in the Pas-de-Calais department of Hauts-de-France, France. Boat tours depart from Clairmarais, on Rue du Camping, about 5 km from Saint-Omer, and are the main way visitors experience the marsh. The area is known for its flat-bottomed boats, narrow waterways and a landscape shaped by centuries of drainage and cultivation, and it supports varied birdlife and plant species.
Guided boat tours run from April to October, daily from 09:00 to 18:00, and cost about €7 per adult. A guide poles or motors the boat through the channels, passing small farms, floating gardens, willow-lined banks and wooden footbridges, while explaining the history of the marsh, local market gardening and wildlife. Visitors who prefer to explore independently can hire self-paddle boats from around €8 per hour, which suits those wanting a quiet, slower pace.
A full outing usually takes two to three hours. The best period is May to July, when wildflowers bloom along the banks and bird life is at its most active, with herons, kingfishers and warblers common. Summer evenings are calm, and early morning offers mist on the water and soft light for photographs, while autumn brings muted colours and fewer visitors.
Crowds are heaviest on sunny weekends and in school holidays, when popular departure times can fill. Weekday mornings are quieter, and booking ahead is useful in peak season. Waterproof layers and insect repellent are useful, as the marsh is damp and mosquitoes may be present in summer. Sun protection is also advisable on open stretches.
A car is the easiest way to reach Clairmarais from Saint-Omer. Visitors without a car can take a TER train to Saint-Omer from Calais in about 20 minutes and continue by taxi, at roughly €10. The nearby town of Saint-Omer has its own cathedral and museums, making it easy to extend the day.
| Admission | Boat tour €7 / ~$8 per adult; self-paddle hire from €8/hr |
|---|---|
| Hours | Guided boat tours: April–October daily 09:00–18:00 |
| Typical visit | 2–3 hours |
| Best time | May–July for wildflower blooms and bird life |
| Getting there | Car from Saint-Omer (5 km); TER train to Saint-Omer from Calais 20 min, then taxi (~€10) |
| Address | Rue du Camping, 62500 Clairmarais |
Location
Rue du Camping, 62500 Clairmarais
50.7424, 2.2514 View on map
Highlights
- Guided boat tour through reed-lined canals
- Self-paddle hire for independent exploration
- Market gardens and floating plots unique to the marsh
- Birdlife and wildflowers from May to July
Tips for visiting
- Boat tours cost about €7 per adult and run April to October.
- Self-paddle hire starts around €8 per hour.
- Visit May to July for flowers and birds.
- Bring waterproofs and insect repellent.
- Book ahead on summer weekends.
When to visit
May to July offers wildflowers and active birdlife. Weekday mornings are quietest.
Accessibility
Boarding the boats involves steps and uneven landing stages, so wheelchair access may be limited. Visitors with mobility needs should enquire with the operator beforehand.
Frequently asked questions
How long does a visit take?
Two to three hours including the boat tour and time at the water's edge.
When do boat tours run?
Tours operate from April to October, daily from 09:00 to 18:00.
Is it worth it for kids?
Yes, the boat ride and wildlife suit families, and children should wear life jackets where provided.
How to get there without a car?
Take a TER train to Saint-Omer from Calais in about 20 minutes, then a taxi of around €10.