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GR-121Long Distance Trail (GR)·Linear
GR-121. Etapa 03. San Sebastián/Donostia-Orio
San Sebastián, Biscay
Easy24.1/100Year-round
Distance
16.2 km
Est. duration
4h 6min
Elevation gain
+33 m
Elevation loss
-107 m
Highest point
314.4 m
Lowest point
3.1 m
Average elevation
167 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
Demanding Climb
CAT 4
km 2.5 · 1.1 km Distance
11% Avg
6m – 125mSlope24% Max
RiskMEDIUM
Dangerous Descent
km 12.7 · 2.0 km Distance
12% Avg
53m – 291mSlope20% Max
RiskMEDIUM
Dangerous Descent
km 15.4 · 0.7 km Distance
11% Avg
3m – 82mSlope12% Max
RiskMEDIUM
Demanding Climb
km 10.8 · 0.8 km Distance
7% Avg
247m – 304mSlope13% Max
RiskLOW
Demanding Climb
km 3.7 · 0.8 km Distance
7% Avg
128m – 181mSlope8% Max
RiskLOW
7-Day Forecast
Slope distribution
Flat (≤1%)17%Gentle (1–5%)35%Steep (5–10%)26%Extreme (≥10%)22%
Child-friendlyNo
Pet-friendlyNo
- 👟Trail running shoesFootwearRecommended
- 💧Carry 4–5 L (no water sources on route)WaterEssential
- 🧴Sunscreen recommendedSun protectionRecommended
- 🗺️GPS or offline route downloadNavigationEssential
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About this trail
Senderos de Gran Recorrido (GR)
| Start municipality | San Sebastián |
| Region | Biscay |
| Source | Federación Española de Deportes de Montaña y Escalada (FEDME) |
| Start | 43.32172, -1.98664Open in maps |
| End | 43.27591, -2.12708 |
| Track points | 1,219 |