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Harmas-Koros
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The Hármas-Körös (Triple Koros) is one of the most pretty and natural rivers in southeastern Hungary, formed near Gyomaendrőd by the confluence of the Kettős- and Sebes-Körös rivers. It meanders for 91 kilometers until it joins the Tisza at Csongrád. Its primary characteristic is the extremely rich system of oxbow lakes, created during the large-scale river regulations of the 19th century, which have since become a paradise for anglers. The floodplain forests along the Hármas-Körös are among the last untouched forest patches of the Great Plain, dominated by black poplars and willows. The river is excellent for water tourism, as its slow current and clean water allow for safe and scenic rowing for nature enthusiasts.
- Location: Hungary
- Nearby: Szentes (33 km)
Best time to visit & climate
The most pleasant time to visit is Jun, Aug, Sep.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | -1 | 1 | 6 | 12 | 18 | 22 | 24 | 24 | 18 | 12 | 6 | 0 |
| Rain mm | 34 | 37 | 39 | 41 | 60 | 76 | 69 | 50 | 50 | 46 | 43 | 44 |
📋 Practical info
Getting there
Access to the river is commonly via minor rural roads and agricultural tracks extending from villages across the Great Hungarian Plain. Several designated recreational areas, local beaches, and small boat ramps provide easier entry points.
Best season
Late spring to early autumn is the most popular time for visiting, offering warm weather well-suited for paddling, fishing, and camping.
Terrain & paths
The surrounding landscape is famously flat, characterized by wide floodplains, gallery forests, and extensive agricultural fields. Pathways near the water are mostly natural dirt tracks, grass embankments, and protective dykes.
What to bring
Mosquito repellent is absolutely essential during the warmer months when insects are abundant near the slow-moving water. Bring plenty of drinking water, reliable sun protection, and comfortable outdoor footwear for walking on grassy dykes.
Parking
Parking is generally informal and can be found along the access dirt roads or near local floodplain entry points without much difficulty. Visitors should always ensure they do not obstruct agricultural vehicles working in the area.
Safety
Swimmers should remain vigilant for sudden drop-offs and uneven riverbeds, and only use locally recognized safe swimming areas. Water levels and currents can change, especially following periods of heavy rain upstream.
Time needed
Many visitors spend half a day enjoying a picnic, observing the rich birdlife, or cycling along the extensive flood protection dykes.
Geography
Facts
- Total length of the river is 91 kilometers from confluence to mouth.
- A significant left-bank tributary of the Tisza River at Csongrád.
- The number of oxbow lakes along the river exceeds twenty.
- The floodplain is protected under the Körös-Maros National Park.
- Common fish species include catfish, zander, and nase.
- The famous Szarvas Arboretum is located directly on the riverbank.
- Water levels are regulated by the dam at Békésszentandrás.
- Features one of the longest continuous levee systems in Hungary.
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
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© OpenStreetMap contributors · OpenRouteService
Sights nearby
Frequently asked questions
Where does the Hármas-Körös begin?
It is formed near Gyomaendrőd by the confluence of the Kettős-Körös and Sebes-Körös rivers.
Are there public beaches on the river?
Yes, there are pleasant public beaches and swimming spots at Gyomaendrőd and Szarvas.
Can you go on boat trips?
Yes, Szarvas is the hub of water tourism, offering sightseeing cruises and small boat rentals.
What fish live in the river?
The river has a rich fish stock, with catfish, pike-perch, pike, and carp being the most common.
Are there bicycle paths along the river?
Developed bicycle paths and accessible embankments await cyclists on the river's dikes.
Harmas-Koros: where is it located?
Harmas-Koros is located in Hungary.
Harmas-Koros: when is the best time to visit?
The most pleasant time to visit is Jun, Aug, Sep.
Harmas-Koros: why is it worth visiting?
The Hármas-Körös (Triple Koros) is one of the most pretty and natural rivers in southeastern Hungary, formed near Gyomaendrőd by the confluence of the Kettős- and Sebes-Körös rivers.
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Csongrád
City at the confluence of the Körös and Tisza rivers, known for its old town and sandy beach.
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History & landmarks
Nature
🗺️
Kettos-Koros
Formed by the confluence of the White and Black Koros rivers.
🗺️
Sebes-Koros
A river coming from Transylvania and flowing through Bekes county.
Biharugra Ponds
The second largest artificial fishpond system in Hungary.
🗺️
Hortobagy-Berettyo
A river connecting the Hortobágy Puszta with the Berettyo.
Tisza at Szajol
A beautiful section of the Tisza near Szolnok.
Zagyva River
A significant tributary of the Tisza, which flows in at Szolnok.
🗺️
Nagykunsagi Reservoir
A huge reservoir to ensure irrigation in the Great Plain.
🗺️
Lake Csaj
An extensive pond system in the Pusztaszer Nature Reserve.
More places
Szarvas Horse-drawn Mill
A rare 19th-century horse-drawn mill, now functioning as a museum.
Koros Valley Animal Park
An animal park in Szarvas showcasing the native fauna of the Carpathian Basin.
Bekescsaba Sausage Factory
The home of the famous Csabai sausage, a symbol of Hungarian gastronomy.
Almásy Mansion Gyula
A splendid Baroque mansion with an interactive exhibition about noble life.
Gyula Castle
The only intact Gothic brick castle in the Carpathian Basin.
🗺️
Malyvadi Forest
One of the largest continuous forest areas in the Great Plain.
Tiszakurt Arboretum
A beautiful park on the banks of the Tisza, with rare tree species.
Szolnok Paper Mill
One of Hungary's oldest paper mills, now part of a global group.