The Black Forest Railway or Schwarzwaldbahn is one of Germany’s classic mountain railways, and its reputation makes more sense once the route starts climbing into the forest.
The historic line runs for about 149 kilometers from Offenburg to Singen, cutting across the Black Forest rather than simply following an easy valley floor. Completed in 1873 under engineer Robert Gerwig, the railway was built to connect the Rhine lowlands with communities across the mountains and the Lake Constance region. Getting there required 39 tunnels, a viaduct and a clever system of loops to manage the steep terrain.
The most interesting section comes after Hausach, as the train climbs toward Hornberg, Triberg and St. Georgen. Between Hornberg and Sommerau alone, the railway gains 448 meters in elevation. Gerwig stretched what is roughly 11 kilometers as the crow flies into 26 kilometers of track, using curves and loops to gain height without turning the railway into an excessively steep mountain line. The engineering becomes surprisingly easy to notice from the carriage: wooded valleys appear below, tunnels cut through the mountainside and each return to daylight seems to place the train a little higher than before.
That engineering is also what makes the Black Forest Railway such a good sightseeing route. Outside the window are thick forested slopes, small towns, old farmhouses and the occasional church tower tucked into the valleys. Around Hornberg and Triberg, the scenery gets especially good, but the train never feels like a tourist attraction pretending to be public transport. Current Black Forest Railway regional services continue beyond the historic Offenburg-Singen line, running between Karlsruhe and Konstanz.
And it takes very little effort to enjoy it. You can stay on board and watch the Black Forest change as the train climbs or stop somewhere like Gengenbach or Triberg and turn the journey into a full day out. The tunnels, loops and mountain scenery give the ride plenty of character, while the stations along the way make it practical for actual travel.

The Black Forest Railway runs for about 149 kilometers from Offenburg to Singen, cutting right across the Black Forest from the Rhine Plain to the Hegau region near Lake Constance. It was fully opened in 1873 and follows the Kinzig Valley before climbing into the mountains between Hornberg, Triberg and St. Georgen, where it winds through 39 tunnels, crosses a viaduct and makes use of two large looping sections to gain height.
Today, Regional-Express (RE 2) trains actually run beyond the historic line in both directions, continuing between Karlsruhe and Konstanz. But if you’re thinking of the classic Black Forest Railway experience, the core stretch is really Offenburg to Singen. From there, it’s an easy decision whether to stop or keep going. Konstanz just makes for a natural extension if you’d rather finish the day on the shores of Lake Constance instead of turning back at Singen.
The journey begins in Offenburg, sitting between the Rhine Plain and the western foothills of the Black Forest. It is an important railway junction, with the Rhine Valley Railway continuing north and south while the Black Forest Railway turns east toward the mountains. The city itself lies among vineyards and fruit-growing country, with the Kinzig providing the natural route into the forest.
Leaving Offenburg, the scenery does not immediately turn into dense pine forest. The railway eases into it. Flat farmland gradually gives way to vineyards, wooded hills and villages gathered along the Kinzig.
Gengenbach is the first stop that seriously tests any plan to stay on the train all day. Its compact old town sits close to the station, with historic gateways, half-timbered buildings and narrow streets surrounded by vineyards and wooded hills. The railway continues deeper into the Kinzig Valley from here. Hills close in on both sides, the river stays nearby and traditional farmhouses begin appearing between patches of forest.
Haslach brings another historic town into the mix, this time deeper inside the Kinzig Valley. The railway runs through a landscape shaped by forested slopes, small settlements and the river. This part of the route is more about watching the geography tighten around the railway. Villages occupy the limited flat ground along the valley floor while wooded hills rise almost immediately behind them. It is a good warm-up for what comes after Hausach.
Hausach sits beneath the ruins of Burg Husen and marks one of the most important transitions on the journey. The town developed at a strategic point in the Kinzig Valley and the castle above it once guarded the old transport route through the region.
More importantly for the railway, Hausach is where things start getting properly mountainous. The relatively broad Kinzig Valley is left behind as the tracks turn south into the Gutach Valley toward Hornberg. The slopes become steeper and the settlements smaller.
Between Hausach and Hornberg, the railway follows the Gutach Valley through one of the most recognizably Black Forest parts of the route. Traditional farmhouses sit beneath steep wooded slopes, with meadows breaking up the forest along the valley floor.
Gutach is best known for the Black Forest Open Air Museum Vogtsbauernhof, where historic farmhouses, mills, workshops and barns document centuries of rural life in the region. There is a railway stop directly outside the museum, but there is one useful detail to know: the through RE 2 Black Forest Railway service does not stop there. The Gutach Freilichtmuseum stop is served by the local RB 20 Ortenau-S-Bahn between Offenburg and Hornberg, so visiting requires changing to the local service.
Hornberg is where the Black Forest Railway starts showing what all those engineering statistics actually mean. The town sits deep in the Gutach Valley, with the remains of Hornberg Castle above and the railway climbing along the surrounding slopes.
Its most obvious railway landmark is the Hornberg Viaduct, a seven-arched structure spanning the Reichenbach Valley. The present viaduct was built in 1924-25 and is the only viaduct on the Black Forest Railway. It is about 150 meters long and 24 meters high, but from the train the more interesting part is what happens immediately afterward: the route begins its serious climb toward Triberg and St. Georgen.
This is where finding a good window seat starts paying off.
The stretch between Hornberg, Triberg and St. Georgen is the headline section of the Black Forest Railway. The direct distance between these places is not particularly huge. Engineer Robert Gerwig solved the problem by sending the tracks on long curves, through tunnels and around large loops, allowing trains to gain elevation gradually instead.
The train disappears into one tunnel, curves through the mountain and emerges with the valley suddenly sitting much farther below. At certain points, sections of railway already travelled can be seen from higher up the slope. The Black Forest Railway Adventure Trail around Triberg was specifically created to explain this engineering and provide viewpoints over the looping tracks.
Triberg itself is famous for its waterfalls and its long association with Black Forest clockmaking. The waterfalls require leaving the station and heading into town, so this is a proper stop rather than something that can be checked off through the window.
The railway continues climbing beyond Triberg toward St. Georgen, crossing the high central Black Forest. By now the deep valley scenery begins opening into higher plateaus, meadows and scattered farms. St. Georgen itself sits at around 800 to 1,000 meters above sea level. It also marks the point where the most intense railway engineering begins to settle down. The tunnels and curves are still part of the journey, but the dramatic climb through the Gutach Valley is largely complete.
Villingen brings medieval streets back into the itinerary after a long stretch dominated by mountains and railway engineering. The historic center retains much of its defensive structure, including an almost complete town wall, large gates and towers surrounding the old street plan.
It is one of the stronger places for a longer break because the railway station sits beside an actual town rather than a trailhead or scattered mountain settlement. After the tight valleys around Hornberg and Triberg, the surroundings also feel noticeably broader.
Donaueschingen gives the journey one of its biggest geographical flexes. This is the city associated with the source of the Danube. The formal Danube spring sits beside the Fürstenberg Palace complex, while nearby the Brigach and Breg meet to form the river that continues east across Europe.
The scenery around the railway changes again here. After dozens of tunnels, suddenly being able to see a long way ahead feels almost weird.
Immendingen continues the Danube theme, but with a much stranger twist. Near the town, sections of the Danube can disappear into the porous limestone beneath the riverbed in a natural phenomenon known as the Danube Sinkhole. Some of that underground water later reappears about 12 kilometers south at the Aachtopf spring.
Engen sits in the Hegau, where isolated volcanic hills start rising from the countryside. It is a striking change after the continuous forested ridges around Triberg. The historic center is one of the best-preserved old-town ensembles in southern Germany, with medieval streets, a market square and carefully restored buildings packed onto the hillside.
The surrounding landscape is the bigger story from the train. The forest has opened up, visibility stretches much farther and the volcanic hills give the final section a shape of its own.
Singen is the southern end of the historic Black Forest Railway and feels very different from where the journey began. The city sits in the volcanic Hegau landscape, dominated by Hohentwiel, a steep former volcanic cone topped by enormous fortress ruins.
Reaching Singen completes the classic route from Offenburg. Over roughly 149 kilometers, the railway has moved from the Rhine Plain into the Kinzig Valley, climbed through the tunnels and loops around Triberg, crossed the high Black Forest and entered open volcanic country near Lake Constance. That amount of landscape change is exactly why riding the whole route works so well.
But there is no real need to call it a day here.
Modern Black Forest Railway services continue from Singen through Radolfzell and Allensbach to Konstanz, turning the historic mountain railway into a direct connection with Lake Constance. Deutsche Bahn currently operates through Regional-Express services between Karlsruhe and Konstanz, so you can simply remain onboard after Singen.
The final stretch trades mountain engineering for lake country. After Radolfzell, the railway follows the western side of Lake Constance toward Konstanz, where the main station sits close to the old town and waterfront. Konstanz itself is the largest city on the lake, with a historic center spreading behind the station.
It is technically beyond the original Offenburg–Singen Black Forest Railway, but as an ending, it makes a lot of sense. The journey begins at the edge of the Rhine Plain, spends its best section twisting through the Black Forest and finishes beside one of Central Europe's largest lakes.
The direct journey from Offenburg to Singen takes around 1 hour and 50 minutes on the Regional-Express (RE 2), covering the historic Black Forest Railway’s roughly 149-kilometer route. Services run hourly, so no transfer is required when travelling straight between the two cities.
The first section from Offenburg follows the Kinzig Valley through Gengenbach, Haslach and Hausach. It is the gentler part of the route, gradually leaving the Rhine Plain and entering the Black Forest. Hausach is reached after roughly 20 to 30 minutes. And from Hausach, the line enters the Gutach Valley and climbs through Hornberg, Triberg and St. Georgen. This is the most scenic section, with tight curves, tunnels and steady elevation gain through the mountains. Triberg comes about 45 minutes after departure, with St. Georgen around 13 minutes later.
Beyond Villingen, the landscape opens up as the train continues through Donaueschingen, Immendingen and Engen. The final stretch crosses the Hegau before reaching Singen, where the historic Black Forest Railway ends. Passengers continuing to Konstanz can remain on the same RE 2 service. The full journey from Offenburg to Konstanz generally takes around 2 hours and 15 minutes, adding roughly another 25 minutes after Singen.
The Black Forest Railway is served by Regional-Express (RE) trains running once an hour. These through services operate between Karlsruhe and Konstanz, stopping along the historic Black Forest Railway at Offenburg, Gengenbach, Haslach, Hausach, Hornberg, Triberg, St. Georgen, Villingen, Donaueschingen, Immendingen, Engen and Singen. Additional regional trains operate on some sections of the route, so there can be more than one option per hour depending on where you are travelling.
For the latest departure times, the easiest option is DB Navigator or Deutsche Bahn's journey planner. Both show current schedules, platform information and delays, which is useful because engineering work can occasionally alter regional services. Tickets can also be purchased directly through DB Navigator or the Deutsche Bahn website. And if you prefer buying a ticket at the station, Deutsche Bahn ticket machines sell regional tickets and provide live timetable information. Tickets are also available from staffed DB sales points and Reisezentren where available.
If you are planning several stops, the Baden-Württemberg-Ticket can be useful. It allows unlimited regional and local transport within Baden-Württemberg for one day. Another option is the Deutschland-Ticket, which is valid on regional trains including RE services throughout Germany. It is a monthly subscription rather than a single-day sightseeing ticket, so it makes more sense for travelers already using regional public transport extensively during their stay.
Offenburg, Singen and Konstanz make sense as overnight bases for completely different reasons. Offenburg puts you at the western entrance to the Black Forest and close to Baden wine country, Singen gives you easy access to the Hegau and Hohentwiel, while Konstanz is where the trip can shift into a proper Lake Constance stay.
Dinner plans deserve a little more thought than simply choosing whatever sits closest to the station. Offenburg brings Baden and Alsatian influences into the mix, Singen is a strong place for Swabian cooking and ingredients from the Hegau and Konstanz finishes things with everything from old-school regional dishes to serious Michelin-level dining. The good news is that you can eat very well at every price point without leaving the cities covered on this route.
The train is the reason for the trip, but Offenburg, Singen and Konstanz are worth giving actual time rather than treating them as platforms with good scenery attached. Offenburg leans into wine and layered city history; Singen is strongest when you head toward Hohentwiel and Konstanz naturally pulls the day toward the lake. Each also has a more polished way to do it, from privately arranged tours to chartering a boat once the railway reaches Lake Constance.
Travel the Black Forest Railway as part of a tailor-made journey through southern Germany, combining one of the country's classic scenic rail routes with carefully chosen stays, private experiences and time in the Black Forest and Lake Constance.
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Not on regular services. The current RE 2 is an electric regional service using Class 146 locomotives and double-deck coaches. Historic steam locomotives are still used for occasional special excursions on the Black Forest Railway.
You should not rely on regular onboard catering on the RE 2. It is best to buy food and drinks before boarding, although you can bring your own refreshments onto the train.
Yes. Black Forest Railway RE 2 trains normally include first-class accommodation. Deutsche Bahn describes the first-class area as having tables and power sockets, but you need a valid first-class ticket or upgrade to use it.
No. A seat reservation is not required for regular RE 2 services. You can simply board with a valid ticket, although trains can be busier at weekends and during popular travel periods.
Yes, provided your ticket allows it. Day tickets and passes such as the Baden-Württemberg-Ticket, Deutschland-Ticket and an eligible Interrail or Eurail travel day make it easy to stop somewhere such as Gengenbach or Triberg and continue later. Check the conditions if you are travelling on a single-journey ticket.
Yes. One of the best examples is the Schwarzwaldbahn-Erlebnispfad, or Black Forest Railway Adventure Trail. Its two routes both start and finish at Triberg station, and hiking routes connected with the railway can also be accessed around Hornberg and St. Georgen.
The Triberg Waterfalls are about a 25-minute walk from Triberg station. The route heads uphill through the town, so allow a little extra time if you prefer a relaxed walk.
Yes. Interrail and Eurail passes can be used on Deutsche Bahn regional trains such as the RE 2, provided your pass is valid for Germany and you have activated a travel day where required. A compulsory seat reservation is not required for this regional service.
Yes, within the KONUS network. The KONUS Guest Card allows eligible visitors to use participating local and regional trains in second class during their stay. It does not cover travel beyond the KONUS area or long-distance ICE, IC, EC and ECE services.
For most first-time visitors, late spring through autumn is particularly appealing. Spring and summer bring green landscapes and longer daylight hours, while autumn adds colour to the forested sections. The railway operates throughout the year, so the best season ultimately depends on the scenery and activities you want to combine with the journey.
Yes. The railway operates throughout the year, and the forest, tunnels and mountain valleys can take on a very different character in winter. The Triberg Waterfalls are also open year-round. Snow is not guaranteed, however, and shorter daylight hours leave less time for stops along the route.
Yes. Revigorate can incorporate the Black Forest Railway into a tailor-made journey through Germany, combining the scenic rail route with carefully selected stays, private experiences, Black Forest towns and time around Lake Constance.
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