Desfiladero de Peñas Juntas, Senda del Oso

Entrago — Buyera

Más popular Fácil Lineal
18 km Distance
1:30 – 2:30 h Duration
−170 m Drop
Easy Difficulty
Compacted gravel Surface
Available Shuttle
Desfiladero de Peñas Juntas

Your route, stop by stop

Entrago

Start Start

You collect the bike in Tuñón and a transfer drops you at Entrago. From there the route unfolds without any mechanical help.

2

Teverga Tunnels

Km 1–6

Five tunnels carved into the rock — some over 300 m and lit up inside. The temperature drops noticeably: perfect respite in summer.

3

Peñas Juntas Gorge

Km 8

The landscape narrows and canyon walls rise above the route. At this point the river is so close you can almost touch it from the saddle.

4

Proaza

Km 11

Rest stop. Bars, restaurants and the bear enclosure — where you can see the Cantabrian brown bear for free. Good place to catch your breath before the final section.

Buyera

Finish · 18 km Finish

End of the line. The shuttle picks you up here and takes you back to the start. If you cycled with the flow, the return is a well-deserved rest.

Practical info

Shuttle included
The return transfer from Buyera to Tuñón is included in most bike rentals. Ask when booking.
All ability levels
The constant descent makes this accessible for anyone comfortable on a bicycle, regardless of fitness.
Open all year
You can do it any day of the year, though the route is busiest in summer and Easter.
Dog-friendly
Dogs allowed with a lead at all times. Trailers available for smaller dogs. Check the 'With Dog' guide.

Frequently asked questions

Do I need to be fit to do Entrago–Buyera?

No. It's downhill all the way, so your legs rest most of the time. Even people who rarely cycle can complete it without problems.

Can I do it without a shuttle?

You can, but you'd have to cycle back up — 18 km uphill. Most people prefer the shuttle, which gets you back in about 30 minutes.

How long does the section take in total?

Between 1.5 and 2.5 hours pedalling at a relaxed pace, plus time at Proaza and Buyera. Count on at least half a day.

Are the tunnels safe for children?

Yes. They are lit, wide enough for two bikes to pass and have no complicated gradients. The little ones love them.

Book a bike

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Quick facts

Distance 18 km
Drop −170 m
Duration 1:30 – 2:30 h
Difficulty Easy
Surface Compacted gravel
Shuttle Available