Si estás pensando en hacer the Senda del Oso by bike, understanding the route will help you organise your day without surprises. Although it is an easy and straightforward trail, knowing the sections, where the key points are and what distance options exist makes the difference between being well prepared and improvising.
Senda del Oso map
The route follows the old track of a mining railway along the Trubia river valley. It is a unique path, perfectly signposted, with no complicated junctions and no traffic. The map is simple: one main line from Entrago to Buyera, with an optional detour to the Valdemurio reservoir. If you need a bike, you can hire one in Entrago with the return transfer included.
Short route: Entrago → Buyera (18 km)
This is the most popular itinerary. It starts in Entrago, at the top of the valley, and ends in Buyera, where the brown-bear enclosure is. The 18 km are almost entirely downhill.
This is the route shown as a solid line on the map. There are no junctions or decisions to make: the path is unique and perfectly signposted. If you start in Entrago and follow the track, you will reach Buyera without any risk of getting lost. It is also the best option if you are going with children.
Short route — Entrago → Buyera
Most popular · all downhill
18 km
Distance
2 – 2.5 h
Duration
Downhill
Profile
Very easy
Difficulty
Direct route with no junctions. Descending profile from Entrago (top of the valley) to Buyera (bottom). The bike rolls on its own for most of the way.
Full route: with the Valdemurio reservoir detour
The full route includes a detour from Caranga de Abajo to the Valdemurio reservoir. On the map this detour appears as a branch that leaves the main track heading south-east, climbs to the reservoir, and then rejoins the main route.
This is the only junction on the map. When you reach Caranga, if you want the full route, take the detour towards the reservoir. Otherwise, continue straight on towards Proaza and Buyera.
Valdemurio reservoir detour
Extra section · uphill · full route only
~28 km
Total
3.5 – 5 h
Duration
Uphill
Detour
Moderate
Difficulty
The detour involves a climb that requires more effort. The reservoir views are worth it, but you need to budget your time carefully. Many people push their bikes on the steepest stretch.
Bike hire in Entrago
Choose your route and start at the top
Short or full route — departing from Entrago with return transfer included.
Key points on the map
There are several points along the route that are worth knowing before you leave. These are the most relevant on the map:
Entrago (km 0)
Start of the route. Bikes are collected here. Free car park available.
Tunnels (km 3)
Five tunnels from the old railway. Some have no natural light — bring a light.
Caranga de Abajo (km 9)
Junction for the reservoir detour. If you keep straight, you head to Proaza and Buyera.
Valdemurio reservoir
Full route only. Access via the detour from Caranga. Demanding climb.
Peñas Juntas (km 12)
Through the limestone gorge of the river Trubia. One of the most striking landscapes.
Proaza (km 18)
Area with bars and restaurants. A good spot to rest or eat.
Buyera (end)
End of the route. Brown-bear enclosure. Return transfer available.
Distances on the map
Distances by section
Approximate — may vary slightly
Entrago → Buyera (short route)
Main route · all downhill
Caranga → Valdemurio reservoir (detour)
One way · ~300 m climb
Full Valdemurio detour (return)
Added to the main route
Full route (with detour)
3.5 – 5 hours including stops
Do you need to carry a map?
Technically, no. The route is perfectly signposted and the path is unique — there is no real risk of getting lost if you follow the track. Even so, having a visual reference before you set off helps you plan your stops and decide which route to take. You can also check how long it takes to ride the Senda del Oso to plan your day.
If you hire bikes from us, we give you a printed map when you collect the bikes. You can also use apps such as Google Maps, Komoot or Wikiloc to follow the route on your phone. Before you leave, make sure you also know where to park at the Senda del Oso.
Common mistakes when reading the map
Thinking the route is hard to follow
It is not — the path is unique and fully signposted from start to finish
Confusing the reservoir detour with the main route
The detour is at Caranga and is optional — keep straight and you reach Buyera with no detours
Misjudging the length of the detour
The Valdemurio detour adds about 10 km and significant elevation — factor this in when planning
Not knowing the route is linear
You start and end in different places — you need to arrange your return to the starting point
Tips for navigating the route
Printed map included
See bike hire
We hand you the map when you collect the bike. Departure from Entrago, transfer included.
Frequently asked questions about the map
What route does the Senda del Oso map show?
The main map shows a linear route from Entrago to Buyera (18 km). There is an optional detour to the Valdemurio reservoir that adds about 10 km, making the total around 28 km.
Can you get lost on the Senda del Oso?
No. The route is perfectly signposted and the path is practically unique. The only junction is at Caranga, where you can take the detour to the reservoir.
Where can I get a map of the Senda del Oso?
If you hire bikes from us, we give you a printed map when you collect the bikes. You can also use apps such as Komoot, Wikiloc or Google Maps to follow the route on your phone.
How many kilometres is the route according to the map?
The short route (Entrago → Buyera) is 18 km. The full route with the reservoir detour is about 28 km.
Is the reservoir detour included on the main map?
Yes, the detour appears on the map as a secondary branch from Caranga towards Valdemurio. It is not compulsory — you can keep straight towards Buyera without taking it.