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GR-285Long Distance Trail (GR)·Linear
GR-285. Etapa 03. Tolosa-Ereñotzu
Tolosa, Biscay
Hard67.1/100Year-round
Distance
33.9 km
Est. duration
10h 26min
Elevation gain
+1,184 m
Elevation loss
-1,264 m
Highest point
808.9 m
Lowest point
21.2 m
Average elevation
396 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 24.5 · 1.6 km Distance
17% Avg
532m – 808mSlope35% Max
RiskHIGH
Dangerous Descent
km 29.7 · 1.0 km Distance
18% Avg
204m – 384mSlope28% Max
RiskHIGH
Demanding Climb
CAT 4
km 23.7 · 0.8 km Distance
14% Avg
699m – 808mSlope26% Max
RiskHIGH
Dangerous Descent
km 26.2 · 0.8 km Distance
20% Avg
359m – 533mSlope26% Max
RiskHIGH
Demanding Climb
km 6.5 · 0.6 km Distance
12% Avg
615m – 684mSlope18% Max
RiskHIGH
Dangerous Descent
km 13.6 · 2.5 km Distance
11% Avg
195m – 462mSlope14% Max
RiskHIGH
Demanding Climb
CAT 3
km 0.2 · 2.9 km Distance
11% Avg
75m – 387mSlope40% Max
RiskMEDIUM
Dangerous Descent
km 31.0 · 1.2 km Distance
15% Avg
27m – 206mSlope22% Max
RiskMEDIUM
7-Day Forecast
Slope distribution
Flat (≤1%)9%Gentle (1–5%)29%Steep (5–10%)29%Extreme (≥10%)33%
Child-friendlyNo
Pet-friendlyNo
- 👟Trail running shoesFootwearRecommended
- 🪄Trekking poles highly recommendedTrekking polesEssential
- 💧Carry 7–8 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 | Tolosa |
| Region | Biscay |
| Source | Federación Española de Deportes de Montaña y Escalada (FEDME) |
| Start | 43.13679, -2.07415Open in maps |
| End | 43.24226, -1.94019 |
| Track points | 1,088 |