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GR-121Long Distance Trail (GR)·Linear
GR-121. Etapa 01. Hondarribia-Pasai Donibane
Fuenterrabía, Biscay
Moderate31.3/100Year-round
Distance
21.6 km
Est. duration
5h 33min
Elevation gain
+85 m
Elevation loss
-143 m
Highest point
438.8 m
Lowest point
0.4 m
Average elevation
205 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 18.7 · 2.0 km Distance
12% Avg
13m – 261mSlope18% Max
RiskHIGH
Demanding Climb
CAT 4
km 12.4 · 0.7 km Distance
12% Avg
305m – 388mSlope18% Max
RiskHIGH
Dangerous Descent
km 2.9 · 0.3 km Distance
16% Avg
15m – 66mSlope17% Max
RiskHIGH
Demanding Climb
CAT 4
km 10.6 · 0.9 km Distance
10% Avg
228m – 317mSlope17% Max
RiskMEDIUM
Dangerous Descent
km 6.8 · 0.3 km Distance
11% Avg
17m – 54mSlope14% Max
RiskMEDIUM
Demanding Climb
CAT 3
km 7.9 · 2.2 km Distance
9% Avg
35m – 224mSlope14% Max
RiskMEDIUM
Dangerous Descent
km 17.1 · 0.4 km Distance
12% Avg
244m – 294mSlope11% Max
RiskMEDIUM
Dangerous Descent
km 14.5 · 0.6 km Distance
9% Avg
383m – 434mSlope15% Max
RiskLOW
7-Day Forecast
Slope distribution
Flat (≤1%)11%Gentle (1–5%)27%Steep (5–10%)31%Extreme (≥10%)32%
Child-friendlyNo
Pet-friendlyNo
- 👟Trail running shoesFootwearRecommended
- 💧Carry 4–5 L (no water sources on route)WaterEssential
- 🧴Sunscreen recommendedSun protectionRecommended
- 🩹Basic first aid kit + whistle + thermal blanketFirst aid kitEssential
- 🗺️GPS or offline route downloadNavigationEssential
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About this trail
Senderos de Gran Recorrido (GR)
| Start municipality | Fuenterrabía |
| Region | Biscay |
| Source | Federación Española de Deportes de Montaña y Escalada (FEDME) |
| Start | 43.38958, -1.78981Open in maps |
| End | 43.32620, -1.92098 |
| Track points | 4,267 |