Cycle routes in Bulgaria: which way and when
Bulgaria: 5 routes with wind, rain and heat by month. The best month is most often October (4/5); data: ERA5 2006–2025.
Routes
| Route | Length | Best months | Best way |
|---|---|---|---|
| EuroVelo 6 - Atlantic-Black Sea - part Bulgaria | 596 km | October | either |
| EuroVelo 13 - Iron Curtain Trail - part Bulgaria South | 456 km | September–October (peak October) | either |
| Velomarshrut - Podbalkanskiyat pat | 431 km | September–October (peak September) | either |
| EuroVelo 13 - Iron Curtain Trail - part Bulgaria West | 211 km | September–October (peak October) | either |
| EuroVelo 13 alternative Svilengrad - Edirne | 198 km | October | either |
How to read the numbers
Wind is the 10 m wind of a 25-km grid cell, daytime hours 9:00–18:00 local solar time; at saddle height in a sheltered valley it is weaker, on a coast or ridge stronger. A positive value is a tailwind. ERA5 slightly over-counts days with ≥ 1 mm of rain (by about 5–7 percentage points) and underestimates daily highs by 1–2 °C. Good day = less than 1 mm of rain between 9:00 and 18:00 (riding hours, local solar time) and a high between 10 and 30 °C; rain at night or in the evening does not spoil it.