| National Road 51 | |
|---|---|
| Εθνική Οδός 51 | |
| Route information | |
| Length: | 128 km (80 mi) |
| Major junctions | |
| North end: | Ormenio |
| South end: | Ardani |
| Location | |
| Regions: | East Macedonia and Thrace |
| Major cities: | Didymoteicho, Orestiada |
| Highway system | |
| National Roads in Greece | |
Greek National Road 51 (Greek: Εθνική Οδός 51, abbreviated as EO51) is a single carriageway road in northeastern Greece. It connects the Greek National Road 2 (Florina - Thessaloniki - Alexandroupoli - Turkey) near Feres with the Bulgarian border near Ormenio. The main towns on the GR-51 are Didymoteicho and Orestiada. The entire GR-51 is part of the European route E85. Its length is about 128 km. It runs from south to north, parallel to the river Evros.
The southern end of the GR-51 is in the village Ardani, part of the municipality Feres, about 40 km east of Alexandroupoli. Here it branches off the GR-2 (the old Egnatia Odos). 2 km north is a new interchange with the Egnatia Odos freeway. The highway bypasses Soufli, Didymoteicho and Orestiada. At Kastanies there is a connecting road to Karaağaç and Edirne in Turkey. The GR-51 ends at the Greek-Bulgarian border near Ormenio, where it connects with the Bulgarian national road 80 to Svilengrad. The only major river that the highway passes over is the Arda in the north.