When to go to the Sundgau?
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Best time: May to September
At a glance
Why go to the Sundgau?
The Sundgau is the little-known corner of Alsace, the part people drive through without stopping on their way to Basel or Belfort. The area is carved up into a host of small communes, which says a lot about its character: a patchwork of villages, half-timbered farmhouses, orchards and ponds dug into the clay soil since the Middle Ages. There are no vineyards and no crowds here, just rolling countryside where the roads wind from one church steeple to the next.
To the south, the landscape toughens: this is the Alsatian Jura, Alsace's other mountain range, with its limestone ridges, cliffs, caves and three ruined castles, Ferrette, Morimont and Landskron, which once guarded the border. Ferrette, a comital town at the foot of its castle, is the gateway, and the Ill, Alsace's great river, rises nearby at Winkel.
It is a destination for families who like castles with free access and short walks, for hikers who can link the three fortresses over 80 kilometres in four days, and for food lovers who come for fried carp, the matured cheeses of Vieux-Ferrette and the craft beers of Vieux-Ferrette. In winter, the carnivals, the New Year's Eve torchlight walk and snowshoeing on the Glaserberg give you another reason to come.
Map of the Sundgau: what is where?
The map shows the 6 places covered in this guide, to picture the distances and plan your route.
- Château de Ferrette
- Château du Morimont
- Château du Landskron
- Oltingue Farm Museum
- Source of the Ill
- Altkirch
How much does a trip to the Sundgau cost?
| Style | Per day | What it covers |
|---|---|---|
| Backpacker | €45-70 a day | gîte or B&B, picnics of farm produce, free castles and trails, the farm museum at €2.50, one fried carp meal during the week. |
| Comfort | €90-140 a day | three-star or boutique hotel, fried carp and Alsatian cooking, cheese and beer tastings, Altkirch's museums. |
| Premium | €200 and up a day | spa hotel near Basel, fine restaurants in the Sundgau and the Basel area, an organised trip on the three-castle trail with luggage transfers. The Sundgau remains a low-key destination, even at the premium end. |
The euro is the currency on the French side, but hikes and outings to Basel are paid for in Swiss francs; cards are accepted almost everywhere on both sides. Keep some cash for farms and small producers.
Is the Sundgau safe?
The Sundgau is quiet countryside with no particular risks. In the ruins of Ferrette, Morimont and Landskron, stick to the paths: the walls are high and sometimes unstable, and some sheer drops have no barrier; keep hold of children's hands. The limestone trails of the Alsatian Jura get slippery in wet weather, and walking shoes are essential for the Grotte des Nains. The area borders Switzerland: carry ID on hikes that cross the border. Ticks are very common in meadows and forests from May to October. Finally, most of the ponds are private and used for fish farming: swimming is not allowed.
What to see and do in the Sundgau
- Château de Ferrette
- Grotte des Nains
- Château du Morimont
- Château du Landskron
- Oltingue Farm Museum
- Source of the Ill at Winkel
- Altkirch
- Park of the Château de Hirtzbach
Château de Ferrette
The Château de Ferrette occupies a rocky peak rising to 612 metres, above a cliff-lined gorge, a strategic promontory occupied since early times. Frederick of Montbéliard, who inherited the lands of Upper Alsace in 1103, settled here around 1125 and took the name of the place: he founded the County of Ferrette, which for nearly two centuries was one of the most powerful lordships in Upper Alsace. In 1271, Ulrich II of Ferrette sold the castle and town to the Bishop of Basel, becoming his vassal, and the county then passed to the Habsburgs. The castle was renovated around 1446, rebuilt in 1488, enlarged in 1552 and then adapted to firearms between 1571 and 1615; in 1540, the Fugger bankers had a rampart built linking the upper castle to the lower castle. In 1632, during the Thirty Years' War, the Swedes seized it and sacked the town; only the lower part was restored, and the castle gradually fell into ruin. Given by Louis XIV to Cardinal Mazarin, the estate passed in 1777 to the Grimaldis, through the marriage of the future Honoré IV of Monaco to a Mazarin heiress, and the Prince of Monaco still bears the title of Count of Ferrette. The ruins, listed in 1930, are being consolidated with help from the town and the département.
Château du Morimont
The remains of Morimont, Burg Mörsberg in German, stand at an altitude of 522 metres in the commune of Oberlarg, one kilometre from the Swiss border, 45 kilometres from Basel and 40 from Mulhouse. First mentioned in 1183, it is recorded in 1271, when the Count of Ferrette placed it under the suzerainty of the Bishop of Basel, and then, like Ferrette and Landskron, it passed to the Habsburgs. The Basel earthquake destroyed it in 1356; the Morimont family, vassals of the Ferrettes, rebuilt it, and Pierre de Morimont, its most illustrious lord, turned it into a fortress fit for firearms. Financial difficulties forced the family to sell it in 1582 to the Counts of Ortenburg-Salamanca. Occupied by the Swedes in 1632, it was completely destroyed by the French on 2 April 1635. Louis XIV gave it in 1641 to the Vignacourt family, who kept it until the Revolution. In July 1826, Xavier Stockmar, Olivier Seuret and the Quiquerez brothers swore an oath here that remains famous in the history of the Swiss Jura. The ruins, listed as a historic monument in October 1841, are free to visit, five minutes' walk from the car park.
Château du Landskron
Landskron towers over Leymen and the Leimental, a few metres from Hofstetten-Flüh, in Switzerland. Built before 1297, it held a key position for watching over the eastern Sundgau, the bend of the Rhine and Basel, and its ownership was already disputed at that time. Having passed to the Habsburgs, it was entrusted in 1462 to the Reich von Reichenstein lords, who enlarged it and made it a fortress in 1516. When Habsburg Alsace became French in 1648, Landskron escaped the fate of the other Alsatian strongholds, which were abandoned or razed: after 1665, Vauban restructured it and installed a garrison. Overshadowed by Huningue and Neuf-Brisach, from the 1690s it served as a state prison, mainly for political prisoners or those locked up by lettre de cachet. In December 1813, at the start of the Campaign of France, Austrian and Bavarian troops dismantled it; only the keep was saved, thanks to the parish priest of Hagenthal-le-Bas, who persuaded General von Wrede to spare it. Listed as a historic monument in 1923, the castle went through a curious interlude in the 1970s, when its owners installed a colony of monkeys there. From the ruins, the panorama takes in the Jura, the Rhine plain and Basel.
Oltingue Farm Museum
Oltingue is a village in the Alsatian Jura, on the banks of the Ill, whose farm museum is a lifetime's work. For years, Abbé Étienne Bilger, a parish priest devoted to his home ground, gathered the objects that Sundgau families were throwing away or banishing to the attic: tools, utensils, furniture, costumes. An association, the Maison du Sundgau, bought and restored an old farmhouse to house them, and the abbé donated his collection to the city of Mulhouse. Some walls have been left bare to show the timber-frame and wattle-and-daub construction. The displays cover the trades, domestic life, farm work and religious life of the Sundgau in the 19th and early 20th centuries; younger visitors marvel at the non-electric waffle irons, the wooden washboard and the old looms. On the edge of the village, the Saint-Martin-des-Champs chapel, the last trace of the original village destroyed by the Armagnacs in 1445, preserves medieval frescoes and Merovingian tombs uncovered during excavations. The museum opens mainly in the afternoon from March to October, for a €2.50 ticket.
Source of the Ill at Winkel
The Ill is the backbone of Alsace: 217 kilometres long, it flows through 68 communes, including Mulhouse and Strasbourg, before joining the Grand Canal d'Alsace at Offendorf. Yet it starts out very modestly at Winkel, a village in the Alsatian Jura backing onto the Glaserberg massif, at an altitude of around 550 metres, in a landscape of meadows and beech woods. At the source, a single step takes you from one bank to the other. A waymarked path lets you extend the walk to the heights, and the Allée des Hêtres opens up a wide view over the hills. The village also has a painful history: its inhabitants were evacuated in 1939-1940 to the commune of Commensacq in the Landes, with which Winkel sealed a twinning in 1978 in memory of that exodus. In winter, the Winkel Nordic site and the snowshoe trails of the Glaserberg draw snow lovers when there is enough cover.
Altkirch
Altkirch, whose name means "old church", is the capital of the Sundgau and a sub-prefecture of the Haut-Rhin, built on a hill above the Ill and surrounded by forests and hills backing onto the foothills of the Alsatian Jura. Founded in the 12th century, the town belonged to the Counts of Ferrette, who had the Saint-Morand priory built. Until 1845, the church stood on what is now Place de la République and the castle on today's Place de l'Église; that year, most of the castle was demolished to build the new Notre-Dame-de-l'Assomption church. The Musée Sundgauvien, created in 1877 from a collection of Celtic axes, moved in 1952 into the former Maison du Bailli, a 16th-century building with a spiral staircase; it brings together archaeology, mementoes of the two world wars, Sundgau furniture and costumes, and a series of portraits by the Alsatian painter Jean-Jacques Henner. CRAC Alsace, a Rhineland contemporary art centre founded in 1992, occupies the former lycée and puts on demanding exhibitions. At the Saint-Morand hospital, the Baroque chapel has a ceiling painted by Giuseppe Appiani. The streets also host works of street art.
How many days, and which itinerary?
A weekend is enough for Ferrette, its castles and a plate of fried carp. Allow four to five days to add Altkirch, Oltingue, the source of the Ill and Landskron, and a week if you want to walk the Alsatian Jura's three-castle trail.
🗺️ Day-by-day itinerary · 📓 Free printable Sundgau guide (PDF) · 🌍 All of France
weekend (2 days)
Day 1: Ferrette, the climb to the castle, the Grotte des Nains and a fried carp lunch at a restaurant on the carp trail, then the Vieux-Ferrette cheese shop. Day 2: Château du Morimont in the morning, the source of the Ill at Winkel, then Oltingue and its farm museum in the afternoon.
4-5 days
Day 1: Altkirch, the church, the Musée Sundgauvien, CRAC Alsace and street art, then the park of the Château de Hirtzbach. Day 2: Ferrette, the castle and the Grotte des Nains, a loop round the Rossberg. Day 3: Morimont, Winkel and the source of the Ill, Lucelle and its pond on the border. Day 4: Oltingue, then the Château du Landskron at Leymen at sunset. Day 5: the Kilometre Zero trail of the 1914-1918 front, between France and Switzerland, or a day in Basel.
one week
Days 1 and 2: Altkirch, Hirtzbach and the Sundgau ponds. Days 3 to 6: the Alsatian Jura three-castle walking trail, about 80 kilometres from Ferrette to Landskron via Morimont, with luggage transfers available. Day 7: a rest day in Ferrette, fried carp and craft beer, or a trip to Basel.
Getting there and getting around
From Paris, the TGV reaches Mulhouse in under 3 hours, then the TER gets to Altkirch in around twenty minutes. Basel-Mulhouse airport, about 40 minutes from Ferrette, has flights from many French and European cities. By car, allow about 5 hours from Paris.
Once there, a car is all but essential: the villages are many and scattered, and buses infrequent. Ferrette is 20 minutes from Altkirch, and all the sites of the Alsatian Jura are less than half an hour's drive from one another.
The Sundgau is well suited to cycling, with waymarked routes and a Tour du Sundgau by bike, but the hills of the Alsatian Jura involve some real climbs; an e-bike helps a great deal.
Where to stay in the Sundgau?
Budget: the family-run hotel-restaurants of Ferrette, Wittersdorf or Lutter offer rooms at €70-95, often with a dining room known for its fried carp. Gîtes and B&Bs in half-timbered farmhouses are plentiful and affordable.
Comfort: at around €110-150, a three-star hotel in Carspach, near Altkirch, and a charming hotel in Lucelle, deep in the forest on the Swiss border, offer more comfort and good food.
Our pick: stay on a half-timbered Sundgau farm, among orchards and ponds, with a farmhouse breakfast; some farms even let you join in the milking before the meal. For a more luxurious stay, a spa hotel in Hagenthal-le-Bas, near Basel, fits the bill.
Our places to stay, stop by stop, at three budgets →
What to eat in the Sundgau?
Fried carp is the Sundgau speciality: carp steaks or fillets coated in semolina, fried until golden and crisp, served with salad, chips, lemon and mayonnaise, and eaten with your fingers. Some twenty restaurants grouped in the Routes de la Carpe Frite association serve it, and the Sundgau holds the Site Remarquable du Goût label. Book ahead, especially on Fridays and at weekends.
In spring, the Carpailles, in March or April, see restaurants reinvent carp in creative menus. The rest of the year, classic Alsatian cooking, choucroute, bouchées à la reine and tartes flambées, is on offer in every inn.
In Vieux-Ferrette, master cheese affineur Antony offers a selection of cheeses from all over France, plus tastings. Also in Vieux-Ferrette, the Radwulf brewery makes craft beers, to taste on site on Friday evenings and Saturdays. Farms also sell fruit and dairy produce.
Entry requirements
Schengen area: an ID card or passport for EU citizens, 90 days visa-free for UK, US, Canadian and Australian passports.
Rules change: check your own government's travel advice before you go.
Frequently asked questions about the Sundgau
When is the best time to visit the Sundgau?
From May to September for hiking, castles and terraces, with meadows in flower in May and June. March and April are the season of the Carpailles, and winter has its charms, with the carnivals and the New Year's Eve torchlight walk in Ferrette.
How is the Sundgau different from the rest of Alsace?
The Sundgau, south of Mulhouse, has no vineyards: it is a region of hills, ponds, orchards and half-timbered farms, extended to the south by the Alsatian Jura and its castles. It sees far fewer visitors than the Wine Route.
Do you have to pay to visit the castles of the Alsatian Jura?
No. Ferrette, Morimont and Landskron are ruins with free access all year round, with no opening hours. You reach them in 5 to 10 minutes on foot from the car park or the nearest village.
Where can you eat fried carp in the Sundgau?
At one of the restaurants in the Routes de la Carpe Frite association, spread across the whole area, from Illfurth to Lucelle and from Montreux-Jeune to Rosenau. Book ahead, especially towards the weekend.
How many days should you plan for the Sundgau?
Two days for Ferrette, its castles and a plate of fried carp, four to five to add Altkirch, Oltingue, Winkel and Landskron, and a week to walk the three-castle trail.
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