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GR-25Long Distance Trail (GR)·Linear
GR-25. Etapa 04. Zalduondo-Barria
Zalduendo, Biscay
Easy22.9/100Year-round
Distance
12.6 km
Est. duration
3h 31min
Elevation gain
+215 m
Elevation loss
-183 m
Highest point
748 m
Lowest point
589.7 m
Average elevation
666 m
Elevation profile
Flat (≤1%)Gentle (1–5%)Steep (5–10%)Extreme (≥10%)
Flat (≤1%)
Gentle (1–5%)
Steep (5–10%)
Extreme (≥10%)
Critical Segments
Dangerous Descent
km 6.1 · 0.3 km Distance
11% Avg
712m – 746mSlope13% Max
RiskMEDIUM
Demanding Climb
km 5.2 · 0.7 km Distance
8% Avg
692m – 748mSlope17% Max
RiskLOW
Dangerous Descent
km 9.6 · 0.5 km Distance
9% Avg
601m – 644mSlope12% Max
RiskLOW
Dangerous Descent
km 11.5 · 0.3 km Distance
6% Avg
617m – 635mSlope10% Max
RiskLOW
7-Day Forecast
Slope distribution
Flat (≤1%)17%Gentle (1–5%)44%Steep (5–10%)26%Extreme (≥10%)13%
Child-friendlyNo
Pet-friendlyYes
- 👟Light hiking shoesFootwearRecommended
- 💧Carry 3–4 L (no water sources on route)WaterEssential
- 🧴Sunscreen recommendedSun protectionRecommended
- 🗺️Offline download recommendedNavigationRecommended
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About this trail
Senderos de Gran Recorrido (GR)
| Start municipality | Zalduendo |
| Region | Biscay |
| Source | Federación Española de Deportes de Montaña y Escalada (FEDME) |
| Start | 42.88554, -2.34593Open in maps |
| End | 42.91602, -2.43473 |
| Track points | 434 |