Big Trail Adventures
Landscape on the GR10 Section 6: Aulus les Bains to Mérens

Self-guided · GR10 · France

GR10 Section 6: Aulus les Bains to Mérens

Your walk from Aulus les Bains to Mérens

You'll walk 97 kilometres through the Ariège Pyrenees, from a thermal-spa village to a mountain railway station — over the Port de Bassiès and into a chain of high lakes, then along the airy Crête des Isards before the long descent. A route that earns every metre of its 5,550 metres of ascent.

Distance
97 km
Ascent
5,550 m
Stages
3 – 7 days
Grade
Tough

This section builds to the GR10's high, committing crest walking — days spent above 2,000 metres with long views and not much company. It suits walkers who've already found their mountain legs and want the trail at its most exposed.

It ends, appropriately, at a railway station rather than a village square — Mérens-les-Vals sits on the line up to Andorra and back to Toulouse, so the walk out is as easy as the walk in was hard.

Trail Essentials

Start
Aulus-les-Bains
French Pyrenees
End
Mérens-les-Vals, Ariège
French Pyrenees
Distance
97 km
60 miles
Total Ascent
5,550 m
18,209 ft
Difficulty
Tough
Hilliness
Mountainous
Time to Complete
Explorer
5 days
~19 km/day
Hiker
4 days
~24 km/day
Fastpacker
4 days
~24 km/day
Trail Runner
3 days
~32 km/day
When to Walk
Best Good Avoid
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC

Aulus-les-Bains to Mérens-les-Vals, Ariège — the stage in numbers.

Here's how this section looks for most walkers. Everything here is a starting point — the planner below rebuilds it around your own pace and dates.

Distance
97 km / 60 miles
Total ascent
5,550 m
Start
Aulus-les-Bains
Finish
Mérens-les-Vals, Ariège
Days walking
3–7 days
Difficulty
Tough
Best months
May–Aug
Part of
GR10

A typical 5-day schedule

Walked at our hiker pace, this is where most of our customers finish each day. Take more days and we'll split the longer stages; take fewer and we'll lengthen them by using the stops in between. We know every option along the route, so your days end up the right length whatever pace you choose.

Suggested day-by-day itinerary for the GR10 Section 6: Aulus les Bains to Mérens
DayStageDistanceAscentWalking
1Aulus-les-Bains toDay 2 stopover17.6 km1009 m8½ hrs
2Day 2 stopover toDay 4 stopover17.7 km1009 m8½ hrs
3Day 4 stopover toDay 7 stopover26.4 km1513 m12½ hrs
4Day 7 stopover toDay 9 stopover17.7 km1009 m8½ hrs
5Day 9 stopover toMérens-les-Vals17.6 km1010 m8½ hrs

How this section unfolds.

Your trail divides naturally into three parts — not by day, but by the character of the country. You climb first into the lake basin of the Bassiès, drop back through forest cols and a pastoral plateau, then commit to the long high crêtes that carry you to Mérens.

The Bassiès Lakes
01

Aulus les Bains to Goulier

The Bassiès Lakes

A first hard climb past flower pasture and old silver workings, then a high pass and the lakes open below.

A first hard climb past flower pasture and old silver workings, then a high pass and the lakes open below.

The Forest Cols
02

Goulier to Les Cabannes

The Forest Cols

Forest cols and stone hamlets, broken by a long climb to a plateau with a panorama in every direction.

Forest cols and stone hamlets, broken by a long climb to a plateau with a panorama in every direction.

The Pyrenean Crest
03

Plateau de Beille to Mérens

The Pyrenean Crest

The trail's highest and most committed section — three cols above 2,000 metres, an airy ridge, and the long drop to Mérens.

The trail's highest and most committed section — three cols above 2,000 metres, an airy ridge, and the long drop to Mérens.

Build your trip

Customise your GR10 Section 6: Aulus les Bains to Mérens.

Pick your pace, party size and dates. The itinerary, distances, nightly stops and the price all update live — no commitment until you're happy.

  • Days sized to your walking speed
  • Each night ends at a stop with accommodation
  • Pricing reflects party size and seasonality
  • Save and share the itinerary with your group
Hiker · 4.0 km/h
2 walkers
Aulus-les-Bains to Mérens-les-Vals
Days
5
Distance
97 km
Walking
47 hrs

Your day-by-day itinerary updates live in the Your itinerary section below.

Trip total
£1,498
£749 per person · 5 nights · party of 2
See my trip
Your live itinerary

Build your itinerary above.

This is the itinerary you're building. Change the pace, party size or start date in the planner above and every stage, distance and date updates here.

This route. These nights.
One clear price.

You are booking the itinerary above: your walking days, your overnight stays and the support that carries you between them.

Your GR10 Section 6: Aulus les Bains to Mérens adventure
Configure your trip in the builder above and it will appear here.
Per Person
—
Trip Total
—
Deposit Today
—

Organising this trail for friends? Build a group trip with individual payments

  • Full refund if unhappy with any changes
  • Confirmation within a few days
  • ABTOT financially protected
Not quite ready?

We'll start planning your trip right away. Not happy with anything? We'll adjust it or refund you — no questions asked.

ABTOT Member 5690

The Association of Bonded Travel Organisers Trust Limited (ABTOT) provides financial protection under The Package Travel and Linked Travel Arrangements Regulations 2018 for Big Trail Adventures (member 5690). Protection is provided for non-flight packages. Full details in our booking conditions.

And that price covers far more than the places you sleep.

Your GR10 Section 6: Aulus les Bains to Mérens is planned from first step to final check-in. The stays, luggage, navigation, local knowledge and a real team behind you are all part of the same trip.

What's included?

Self-guided, but properly supported. You turn up, you walk, you eat well, you sleep well. We handle the logistics.

  • Comfortable accommodation booked for you

  • Daily luggage transfer where available

  • GPX + day-by-day route notes

Not included

  • Travel to the start and from the finish
  • Lunches and evening meals (we'll recommend the best places)
  • Travel insurance

Your Trail Book.
The trip in your pocket.

This is not a generic guidebook. We build a private Trail Companion for your dates, your direction, your overnight stops and every day of your GR10 Section 6: Aulus les Bains to Mérens.

01

Trail Book

08:12
A day in the Trail Companion: Hendaye to Ibardin with distance, ascent, estimated time, route map and elevation profile

Wake up knowing the whole day

Your exact GR10 Section 6: Aulus les Bains to Mérens itinerary — from the place you sleep to the next front door, with the turns people miss and the stops worth making.

02

Trail Book

13:36
Live navigation in the Trail Companion, showing the route on the map with distance remaining and the elevation still to climb

See the trail respond to your pace

Follow your stage offline, see what remains and get a live estimate based on the pace you are actually walking. Your GPX is already cut into each day, ready for Garmin, Coros, Suunto, Apple Watch, Komoot or OS Maps.

03

Trail Book

14:32
The private share link, showing walking progress on the map for friends and family at home

Let home follow the adventure

Family and friends see where you are and when you last updated — no app, no account.

Where you'll stay

Beds that make sense of a long crest day.

Family-run guesthouses and small hotels cover the valley nights, with two refuge stays — Bassiès and Rulhe — where dormitory beds and a communal dinner are the only option. We book the village nights for comfort and the refuges for the fact they're there; details depend on your dates.

  • Half-board at the Bassiès and Rulhe refuges
  • Walker-welcoming hosts in the valley villages
  • Drying space where the building allows
  • Breakfast big enough for a 2,000-metre day

Every trip is planned around your dates and party, so we can't promise you a specific inn — but we can promise the kind of welcome that makes a walking holiday feel like a proper holiday.

Self-guided, fully supported

A self-guided GR10 Section 6: Aulus les Bains to Mérens, explained.

Self-guided means the walking is yours and the logistics are ours. You set off on the GR10 Section 6: Aulus les Bains to Mérens when you want, walk at whatever pace suits you, and stop where you like — there is no group to keep up with and no leader setting the schedule. Everything that makes an independent long-distance walk hard work to organise is handled before you arrive.

There are no fixed departure dates. Choose your own start day, tell us how many nights you want, and the planner rebuilds the 97 km route around it.

You walk
97 km from Aulus-les-Bains to Mérens-les-Vals, Ariège, French Pyrenees — alone, as a pair, or with your own group. No guide, no strangers.
We plan
A 3 – 7 day itinerary built around the pace you pick, with sensible daily distances and the ascent spread properly across the route.
We book
Walker-friendly B&Bs, inns and small hotels along the trail, reserved in your name with breakfast included.
We move your bag
Door-to-door luggage transfer between every stay, so you walk with a daypack.
You navigate
GPX files for every stage plus written route notes — the trail is waymarked, and we flag the few places people go wrong.
We stay reachable
One number for the whole trip, answered by someone who has walked the route.

Your trail, whether you come alone or bring everyone.

We remove the awkward parts at both ends: quiet reassurance for a solo walker, and no unpaid-invoice chasing for the friend who gets a group moving.

Going solo

Independent, not unsupported.

We lend solo walkers a satellite GPS tracker. It updates automatically, even away from phone signal, so you can walk freely while the people at home follow your progress.

  • Fixes your position from satellites, not phone masts
  • Posts automatically every 30 minutes — nothing to remember
  • Keeps working in the glens, on the cliffs and out of signal
Walking solo with us
15:00
The satellite GPS tracker page, showing the day's route and the walker's live position on the West Highland Way
A group trip page showing each walker's payment progress

Bringing friends

Lead the adventure. Don't become the treasurer.

Plan a private GR10 Section 6: Aulus les Bains to Mérens with us and get one shared trip page. Every walker pays their own deposit by card and adds their own details—no bank transfers or payment spreadsheet.

Trail Companion and satellite tracking comparison

Shares your position over the mobile network. You update it when you want to. Needs a phone signal to send anything

Groups of six or more

Bringing a group? Everyone pays their own share.

Book the GR10 Section 6: Aulus les Bains to Mérens as a private group departure and we'll give you your own trip page. One organiser agrees the trip with us; every walker then pays their own deposit by card and fills in their own details. No collecting bank transfers, no spreadsheet of who's paid.

A group trip page listing walkers and showing which deposits have been paid

Things walkers ask us.

How fit do I need to be?

You'll want to be comfortable walking 15-20 km a day with sustained ascent — most stages gain 800-1,200 metres on mountain paths, some of them rocky, and Day 2 climbs 1,190 metres in 11 km. The trail crosses cols above 2,300 metres and one day involves a short cable-assisted descent. This is high-mountain walking, not valley walking, and the daily ascent figures are a better measure of difficulty than distance.

When should I walk it?

June to September is the window. The high cols hold snow into late spring — the Crête de la Lhasse sits at 2,439 metres — so May can carry winter conditions on the passes. October is possible in a settled year, but weather turns quickly and refuges start closing. Mid-summer offers the most reliable conditions; September is quieter, with the same long days starting to shorten.

Do you include luggage transfer?

Luggage transfer runs between road-accessible accommodation, up to 20 kg per bag. Two of your overnight stops are mountain refuges — the Refuge de Bassiès and the Refuge de Rulhe — which can only be reached on foot, so you'll carry what you need for those nights yourself. We sort the logistics either side, and your main bag waits for you at the next valley stop.

What kind of accommodation do you book?

Family-run guesthouses, traditional inns, and small hotels in the valley villages — Aulus, Goulier, Siguer, Les Cabannes, Mérens. The two refuge nights at Bassiès and Rulhe are dormitory-style mountain huts with dinner and breakfast included; that's the only option at those altitudes. Where there's a choice, we book en-suite rooms with breakfast.

Can I walk it solo?

Yes. The trail is well waymarked with the GR10's red-and-white stripes, the refuges are friendly places where you'll meet other walkers, and the valley villages have other accommodation if you want company in the dining room. The high mountain sections are the ones to think about: you're far from a road on parts of Day 6 and Day 7, and weather can change quickly. Solo walkers are well used to this terrain, but it's high country and you need to be confident in your own judgement.

What's the realistic total cost?

The Classic package starts at £749 per person for the six-day Hiker pace, based on two people sharing. That covers all accommodation including the two refuge nights, luggage transfer where possible, and your route booking. On the trail you'll want to budget around €25 a day for lunches and drinks, around €20 for the Plateau de Beille shuttle on Day 6, and around €18 for the train back to Toulouse from Mérens at the end.

Is this a self-guided GR10 Section 6: Aulus les Bains to Mérens walking holiday?

Yes. Every GR10 Section 6: Aulus les Bains to Mérens trip we run is self-guided: you walk the route on your own, at your own pace, with no group and no guide. We do the planning and the logistics — an itinerary of 3 – 7 days built around the pace you choose, accommodation booked in your name along the 97 km route, your main bag moved between stays each day, GPX files and route notes for every stage, and a real person on the end of the phone while you're out there. You choose your own start date; there are no fixed departures.

What's the difference between a self-guided and a guided GR10 Section 6: Aulus les Bains to Mérens trip?

On a guided trip you walk with a leader and a group to a fixed schedule. Self-guided means the day is yours: start when you like, stop for lunch where you like, walk fast or slowly, take a rest day. The route is waymarked and you navigate with the GPX and notes we provide. Everything that makes a trip complicated — accommodation, luggage transfer, the shape of each day — is arranged for you before you arrive.

Can I walk the GR10 Section 6: Aulus les Bains to Mérens without a guide?

Yes — the GR10 Section 6: Aulus les Bains to Mérens is a signed long-distance route and thousands of people walk it independently every year. What most walkers want help with isn't navigation, it's the 97 km of accommodation, the bag transfers, and getting the daily distances right. That's exactly what we take off your hands, while you still walk it under your own steam.

Who books the accommodation and moves my luggage?

We do, both. We book walker-friendly B&Bs, inns and small hotels in your name at each overnight stop, with breakfast, and arrange door-to-door luggage transfer between them so you walk with a daypack. You'll get a full itinerary with every address, check-in detail and transfer time before you travel.

How many days do I need for a self-guided GR10 Section 6: Aulus les Bains to Mérens?

Most people take 3 – 7 days for the 97 km. Our planner lets you set your own pace and number of nights, so you can stretch the trip out with shorter days or compress it if you're used to back-to-back big days — the itinerary, accommodation stops and price all update as you change it.

Craig, founder of Big Trail Adventures

Not sure this is the right section for you?

Craig has walked the GR10 Section 6 in every season. Tell him your dates, party size and ability and he'll come back with a route that fits — or point you at a different section if this one isn't quite right.

Other trails we run.

Ready to plan?
Build your Trip