ST312 Bóni-fok - Pörböly

The ST312 Bóni-fok – Pörböly is a point-to-point stage of the 2,500 km Sultans Trail, a cultural long-distance route in southern Hungary that crosses the Gemenc floodplain forest along the Danube. With negligible climbing — under 50 m of elevation gain across flat, low-lying terrain — it is graded expert because of remoteness, seasonal flooding and demanding navigation rather than altitude.

About the ST312 Bóni-fok - Pörböly

The ST312 is one numbered stage within the Sultans Trail, a 2,500 km cultural walking route running from St. Stephen's Cathedral in Vienna to the Süleymaniye Mosque in Istanbul. The full trail crosses nine countries — Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Greece and Turkey — and commemorates the 1529 campaign of Sultan Süleyman the Magnificent, who marched from Istanbul to the gates of Vienna in 141 days. Today the route is operated by the Netherlands-based Sultans Trail Foundation as, in its own words, "a path of peace and a meeting place for people of all faiths and cultures."

This particular section links Bóni-fok, a backwater inlet on the Danube floodplain, with the railway village of Pörböly in Tolna County. It runs through the heart of the Gemenc, the largest contiguous floodplain forest in Europe and a core protected zone of the Danube-Dráva National Park, established in 1996. The walking is physically flat — the entire region sits between roughly 85 and 95 m above sea level — yet the "expert" grading is well earned. Spring and early-summer floods can submerge whole sections of forest road, way-marking is sparse compared with Western European trails, and there are no shops, taps or shelter for long stretches. This is a stage that rewards self-sufficiency and careful timing.

The reward is a landscape almost unique in Europe: oxbow lakes, towering pedunculate oaks and white poplars, herds of red deer, and one of the continent's densest concentrations of black storks and white-tailed eagles. Walkers trade the dramatic ascents of an alpine trail for silence, water and wildlife. If you are weighing this against a more vertical adventure, our guide to hiking the Theth to Valbona trail in Albania offers a useful contrast in terrain and difficulty.

Route Overview & Stages

The ST312 is normally walked as a single day stage, but it sits between neighbouring Sultans Trail sections that most thru-hikers chain together. The table below shows indicative figures for this stage and the two that bracket it; distances on the floodplain vary year to year as flood-damaged tracks are re-routed.

At roughly 20 km on level ground, the ST312 is a comfortable 5–6 hour walk in dry conditions. Budget far longer in spring: standing water, fallen timber and washed-out causeways routinely turn a half-day stroll into a full and tiring day.

Highlights & Points of Interest

• Bóni-fok backwater — a calm Danube side-arm where the stage begins; a classic spot for kingfishers and a popular fishing inlet at the forest's eastern edge.
• Gemenc Forest — at around 18,000 hectares, the largest floodplain forest in Europe, protected within the Danube-Dráva National Park since 1996 and the defining feature of this entire stage.
• Oxbow lakes (holtágak) — abandoned Danube meanders such as the Rezéti and Grébec backwaters, ringed by reedbeds and home to spawning fish and breeding terns.
• Red deer of Gemenc — the forest holds one of Hungary's most famous deer populations; the September–October rut fills the woods with bellowing stags and draws wildlife watchers from across Europe.
• White-tailed eagle territory — the Gemenc supports dozens of breeding pairs of Europe's largest eagle, alongside black storks that nest in the old-growth oaks.
• Gemenc narrow-gauge railway — a historic 760 mm forest line running between Pörböly and Bárányfok, used to bring visitors deep into the floodplain and a handy emergency exit in season.
• Pörböly Ecotourism Centre — the trailhead village's visitor hub, with information panels, the railway terminus and a welcome cluster of facilities after hours in the woods.
• Danube dykes — raised flood embankments that carry the path above the wettest ground and offer the stage's only long open views across the river plain.

Best Time to Hike the ST312 Bóni-fok - Pörböly

Timing matters more on this stage than on almost any mountain trail, because the limiting factor is water, not snow. The Danube's main flood pulse arrives in spring and early summer, when meltwater from the Alps pushes levels up and the lowest forest tracks vanish underfoot. The Sultans Trail Foundation itself notes that parts of the Hungarian route are best avoided in high water and recommends carrying a tent for this region.

Early autumn — late September into October — is the single best time to walk the ST312. Water levels are typically at their annual low, the forest tracks are firm and dry, daytime temperatures sit around a pleasant 15–20°C, and the red deer rut turns the Gemenc into one of Europe's great wildlife spectacles. Mosquitoes, which can be ferocious here from May to August, have largely died back by then.

A second good window runs from late April into May, when the forest is green and birdlife peaks — though you must check the Danube gauge before committing, as a wet spring can flood the route entirely. As of 2026, Hungary's national water authority continues to publish daily Danube levels for the Baja gauge, and any reading well above the mean is a clear signal to delay. High summer is walkable but hot, humid and heavily bitten; midwinter is quiet and frost-firm but cold, with short daylight and the risk of ice on the dykes.

Practical Information

Accommodation

There is no accommodation inside the Gemenc itself, which is why this stage is bracketed by villages. In Pörböly, the Ecotourism Centre offers simple guesthouse rooms and a campsite; expect roughly €12–18 for a tent pitch and €25–40 for a bed in a shared or private room. Nearby Baja (around 12 km from Bóni-fok) has a fuller range of pensions and small hotels from about €40–60 for a double. Wild camping is not permitted within the national park's core zone, so plan to overnight at the designated campsite or in a village. Carrying a tent remains sensible insurance given the remoteness and the possibility of re-routing around flooded ground.

Getting There & Back

Pörböly sits on the Baja–Bátaszék railway, and its small station makes this stage unusually easy to reach by public transport. From Budapest, take a train to Baja (around 3–3.5 hours), then a local connection to Pörböly; trains and replacement buses run several times daily. The nearest international gateway is Budapest Ferenc Liszt International Airport, roughly 3.5–4 hours away by combined rail and bus. Bóni-fok, at the other end, has no station — most walkers reach it on foot or by bicycle from Baja, or use the seasonal Gemenc narrow-gauge railway, which connects Pörböly with points inside the forest and can shorten or close the loop.

Permits & Fees

No permit is required to walk the marked Sultans Trail through the Gemenc, and there is no charge for the path itself. However, the forest is a protected core area of the Danube-Dráva National Park: stay on designated routes, do not enter fenced hunting or breeding zones, and note that some side-tracks close seasonally for the deer rut and for forestry work. The narrow-gauge railway and the Pörböly Ecotourism Centre charge their own modest ticket and entry fees, typically a few euros.

Gear & Packing List

Pack for water, insects and self-sufficiency rather than for cold or altitude. Waterproof footwear or quick-draining trail shoes are essential, as is a reliable repellent and, in the warmer months, a head net. Because there are no resupply points on the stage, carry all your food and at least 2–3 litres of water — the Danube and its backwaters are not safe to drink untreated. A GPS track loaded on your phone or watch is strongly advised; way-marking here is thinner than on the famous Western European trails.

A light, comfortable pack makes the flat distance feel effortless. The Hyperlite Mountain Gear 2400 Windrider is ideal for a fast day or an overnight, while the larger 3400 Windrider or a supportive Osprey Aether 65 suit multi-stage thru-hikers carrying a tent and several days of food. If you are chaining Sultans Trail stages, our roundup of the best ultralight backpacks of 2026 compares the leading options. Flat walking burns fewer calories than climbing, but full days still add up — see how much fuel you actually need in our guide to how many calories you need hiking a full day.

Similar Trails You Might Like

If the quiet, long-distance character of the Sultans Trail appeals but you want bigger landscapes and more elevation, these routes make natural next adventures. They trade the Gemenc's wetlands for high passes, granite domes and continental crossings, but share the same draw of multi-day, point-to-point walking.

• Pacific Crest Trail (United States)
• Continental Divide National Scenic Trail (United States), 4,988 km
• Half Dome Trail (United States)
• Angels Landing Trail–West Rim Trail (United States)
• Mount Whitney Trail (United States)

Frequently Asked Questions

When is the best time to hike the ST312 Bóni-fok – Pörböly?
Early autumn, from late September into October, is the best time. The Danube is usually at its annual low, so forest tracks stay dry and firm, temperatures are a mild 15–20°C, mosquitoes have faded, and the famous Gemenc red deer rut is in full voice. Late April and May are a good second choice if Danube levels are low.

How difficult is this stage really?
The terrain is flat, with under 50 m of elevation gain, so fitness is rarely the issue. It is graded expert because of remoteness, sparse way-marking, no resupply or water sources, and seasonal flooding that can submerge the route. In dry autumn conditions it is straightforward; in a wet spring it becomes genuinely challenging.

How long does the ST312 take to walk in a day?
At roughly 20 km on level ground, most walkers complete the stage in 5–6 hours in dry conditions, including stops to watch wildlife. Allow considerably more after rain or during the spring flood season, when standing water, fallen timber and re-routes around washed-out causeways can stretch it into a full day.

Where can I sleep along the route?
There is no lodging inside the Gemenc forest. The Pörböly Ecotourism Centre offers guesthouse rooms (about €25–40) and a campsite (around €12–18 per pitch), while Baja near the start has pensions and hotels from roughly €40–60 a double. Wild camping is banned in the national park's core zone, so plan village or campsite stays.

Do I need a permit or pay a fee?
No permit is needed and the marked trail is free to walk. The Gemenc is a protected core area of the Danube-Dráva National Park, so you must keep to designated routes and respect seasonal closures for the deer rut and forestry. The narrow-gauge railway and Pörböly Ecotourism Centre charge their own small ticket fees.

For official route updates and the full nine-country itinerary, consult the Sultans Trail Foundation, and check protected-area rules and seasonal closures with the Danube-Dráva National Park before you set out.