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GR-121Long Distance Trail (GR)·Linear
GR-121. Etapa 15. Aritxulegi-Behovia
Oyarzun, Biscay
Moderate28.1/100Year-round
Elevation profile
Flat (≤1%)
Gentle (1–5%)
Steep (5–10%)
Extreme (≥10%)
Critical Segments
Dangerous Descent
km 1.4 · 1.1 km Distance
17% Avg
406m – 601mSlope37% Max
RiskHIGH
Demanding Climb
CAT 4
km 0.2 · 0.6 km Distance
14% Avg
498m – 579mSlope31% Max
RiskHIGH
Demanding Climb
CAT 4
km 2.9 · 0.9 km Distance
13% Avg
397m – 516mSlope29% Max
RiskHIGH
Dangerous Descent
km 8.4 · 2.1 km Distance
11% Avg
190m – 422mSlope26% Max
RiskHIGH
Dangerous Descent
km 12.0 · 1.8 km Distance
12% Avg
4m – 218mSlope21% Max
RiskMEDIUM
Dangerous Descent
km 4.5 · 0.3 km Distance
15% Avg
492m – 542mSlope21% Max
RiskMEDIUM
Demanding Climb
km 10.5 · 0.7 km Distance
9% Avg
185m – 246mSlope21% Max
RiskMEDIUM
Dangerous Descent
km 7.9 · 0.3 km Distance
6% Avg
425m – 446mSlope7% Max
RiskLOW
Distance
15.0 km
Est. duration
3h 54min
Elevation gain
+99 m
Elevation loss
-183 m
Highest point
600.5 m
Lowest point
0.8 m
Average elevation
357 m
7-Day Forecast
Slope distribution
Flat (≤1%)10%Gentle (1–5%)24%Steep (5–10%)28%Extreme (≥10%)38%
Child-friendlyNo
Pet-friendlyYes
- 👟Trail running shoesFootwearRecommended
- 🪄Trekking poles recommendedTrekking polesRecommended
- 💧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 | Oyarzun |
| Region | Biscay |
| Source | Federación Española de Deportes de Montaña y Escalada (FEDME) |
| Start | 43.27103, -1.79256Open in maps |
| End | 43.34415, -1.76098 |
| Track points | 2,027 |