Senda del Oso by Bike
Cycling Routes on the Senda del Oso
One of the most accessible cycling routes in Asturias. Easy, paved, impossible to get lost, and with a free return transfer included.
At a glance
An easy, paved route — impossible to get lost
No previous experience needed. The route is almost entirely downhill and anyone can complete it without difficulty.
Book a bike18–28
km
Distance
2–5
hours
Duration
Easy
for all
Difficulty
100%
paved
Surface
Choose your ride
Two routes to choose from
Easy route
Entrago
→ Buyera
18km
Distance
−200m
Elevation
2–2,5h
Duration
The route starts from Entrago on a gentle continuous descent to Buyera. No technical difficulty, perfectly signposted and suitable for anyone.
Easy route · 18 km · All downhill
Entrago
→ Buyera
Section by section
Km 0 · Start
Departure
from
Entrago
A peaceful start through meadows and farmsteads. 18 km fully downhill — not a single climb. The pace is so gentle at first that it barely feels like you've started.
The Tunnels
The section everyone loves most. Tunnels lit up inside the rock, some hundreds of metres long. Darkness, cool air, and quite the wow factor.
5
tunnels
Km 8–12 · Nature
Valleys &
picnic spots
The Teverga river flows alongside the path. There are areas with stone tables, drinking fountains and shade. The best section to stop, get out the sandwiches and take your time. Nobody regrets it.
8 km
to the finish
Km 12–15 · Geology
Penas Juntas
Gorge
The limestone walls close in until they leave a narrow corridor. Moss, ferns and constant dampness. In places you can touch the rock without getting off your bike. Don't expect it — it's better than any photo.
The Bear
Enclosure
Molina has lived in this enclosure near Buyera for years. Free entry, no set visiting times. A stop that children never forget.
La Senda del Oso en Bici
Ready to ride the route?
Full route · 28 km · With reservoir
Entrago
→ Valdemurio
Section by section
Km 0 · Start
Departure
from
Entrago
Same start, different goal. 28 km in total, reservoir included. The first section is identical to the short route — tunnels, river, gentle descent — until at Caranga the route splits and things get interesting.
The
Tunnels
The same tunnels carved through living rock — lit up, cool, hundreds of metres long. Routes 1 and 2 are identical here. At Caranga everything changes.
5
tunnels
Km 8 · The fork
Caranga
de Abajo
At Caranga the route forks. Most people go straight towards Buyera — you turn left towards Valdemurio. The traffic disappears, the forest closes in and the gradient starts to make itself felt. This is where the part not everyone sees begins.
20 km
still ahead
The only
climb
6 km of climbing through chestnut and hazel trees. The average gradient is under 2% — manageable, but you feel it. You can take it easy or walk a stretch without any problem. The forest softens the effort.
6
km climb
Valdemurio Reservoir
Just water, mountains and silence. Surrounded by the peaks of the Las Ubinas Natural Park. From here, it's all downhill.
Km 14–28 · Descent
Proaza
& the bears
From the reservoir, 14 km downhill to Buyera. The Penas Juntas gorge appears again — this time you cross from the other side. Proaza has bars for a stop. And at the end, the bears. The return transfer runs every hour.
The route
Senda del Oso Map
Fully signposted and paved route. Both routes start in Entrago and end in Buyera. We provide a printed map when you collect your bike.
Choose your route
Entrago
Start · bike pick-up
Tunnels
5 illuminated tunnels
Peñas Juntas
Limestone gorge of Trubia
Valdemurio
Reservoir · route 2 only
Proaza
Bars · restaurants
Buyera
Brown bears · transfer
Accessible for everyone
A route for everyone
No previous experience needed. The trail is paved, downhill, and suitable for anyone.
Families with children
Kids' bikes, baby seats and trailers. We adapt the equipment to each child's age.
No experience
All downhill, no technical difficulty. Anyone can complete the route without problems.
Groups
Over 200 bikes available. We organise rides for groups of any size.
Couples and friends
A different getaway through one of the most beautiful natural landscapes in northern Spain.
The experience
What to see along the route
Tunnels
Five tunnels carved through limestone rock, illuminated with LED lights. The sound of the river, the darkness, and the light as you emerge. You'll inevitably stop to take photos.
Natural landscape
Chestnut forests, banks of the Trubia river and views of the Picos de Europa. The valley gradually opens up as you ride. The scenery changes with every kilometre.
Valdemurio Reservoir
Only on the 28 km route. Still water surrounded by mountains. A mandatory stop to breathe and take it all in before the final descent.
Bear enclosure
On arrival at Buyera, the Wildlife Park is home to rescued Asturian brown bears. A surprise at the end of the ride that everyone loves.
Before you go
Recommendations
Comfortable clothes
No technical clothing needed. Sports clothes are fine. The route is downhill and requires little effort.
Closed-toe shoes
Sports trainers. Avoid sandals or flip-flops — the pedals and gravel will thank you.
Water and a snack
Bring at least 1 litre per person. There are few places to refill on the short route.
Sun protection
In summer some sections are very exposed. Sunscreen and a cap, especially with children.
Light waterproof
In spring and autumn the weather can change quickly. A thin waterproof takes up no space in a backpack.
Charged mobile phone
For photos and in case you need to reach us. Coverage is good along almost the entire route.
Organisation
How to plan your ride
The route begins in Entrago, where our facilities are located. You start riding directly from there. Once you finish in Buyera, we pick you up and bring you back at no extra cost.
Starting point
Arrive at our facilities in Entrago. Free parking is available. We explain everything before you set off and hand you the bike, helmet, and map.
Departure times
9:30 – 14:30
The route
Ride at your own pace. The route is perfectly signposted and impossible to get lost. If you have any problem, call us and we'll help.
18 km
Short route
28 km
Long route
Return transfer
On arrival at Buyera, wait for the transfer that runs every hour. We pick you up and take you back to Entrago at no extra cost. It's included in the price.
No, it's an easy route accessible to all levels. Most of the way is downhill and requires no previous experience or special fitness.
Yes, it's one of the most recommended routes for families with children. We have baby seats, child trailers, and bikes in different sizes for each age group.
Between 2 and 5 hours depending on which route you choose. The short route (Entrago → Buyera, 18 km) takes 2 to 2.5 hours. The full route (28 km) takes 3 to 5 hours.
No. The route is perfectly signposted, fully paved, and we also provide a printed map. It is practically impossible to get lost.
At the end of the route, near Buyera, there is an enclosure with rescued Asturian brown bears. It is one of the main highlights of the route and is included on both routes.
We recommend booking in advance, especially during high season (July and August) and at weekends. Booking is straightforward and in most cases no upfront payment is required.
Bicisendadeloso
Leading provider on the Senda del Oso
4.9
over 3,500 reviews
"Wonderful experience with an incredibly professional team. The descent along the trail was absolutely fantastic. Highly recommended!"
Oscar C.
"Great service. Friendly and attentive. The bikes are in perfect condition."
Pedro del P.
"A highly recommended experience for a family outing. Excellent service, very professional, and a delightful route."
Andrea H.
"We went with my husband and our children aged 9 and 6. The experience was great and the service fantastic."
Gema H.
La Senda del Oso en Bici
Choose your route and book your bike
Everything is ready — all you have to do is pedal.