Mérens to Bouillouses
Into the High Ariège
Mérens-les-Vals in the morning, the high lake country by nightfall, with a 2,480-metre col in between.
GR10 Section 7: Mérens to Vernet les Bains
Your walk from
Mérens to
Vernet-les-Bains
You'll walk 85 kilometres through the high French Pyrenees, from a valley village in the Ariège up over a 2,480-metre watershed col and down through Mediterranean scrub oak to Vernet-les-Bains. A section of the GR10 that crosses from Ariège into Catalan country, with Pic du Canigou for company on the long descent.
French Pyrenees
France
Trail Essentials
- Start
- Mérens-les-ValsAriège
- End
- Vernet-les-BainsPyrénées-Orientales
- Distance
- 85 km53 miles
- Total Ascent
- 4,452 m14,607 ft
Difficulty
Demanding
Hilliness
Mountainous
Time to Complete
Explorer
6 days ~14 km/day
Hiker
6 days ~14 km/day
Fastpacker
4 days ~21 km/day
Trail Runner
3 days ~28 km/day
When to Walk
Best
Good
Avoid
JanFebMarAprMayJunJulAugSepOctNovDec
Section 7 of the GR10 runs 53 miles from the Ariège valley village of Mérens-les-Vals to the Catalan spa town of Vernet-les-Bains — up the Coume d'Agnel to the watershed col at 2,480 metres, down to the granite shores of Lac des Bouillouses, across the Cerdagne plateau, past the Petit Train Jaune railway, and over a final pass into the Mediterranean foothills of Canigou. This is the eastern end of the high Pyrenees, where Occitan country gives way to Catalan, two thousand metres becomes the standard altitude line, and a refuge bed is more likely than a hotel bed. It rewards walkers who are happy with steep climbs, long days at altitude, and a backpack that can carry a sleeping bag liner.
Walking the GR10 Section 7: Mérens to Vernet les Bains
How The Trail Unfolds
Your trail divides naturally into three parts — not by day, but by country. You climb out of the Ariège into the high lake country; you cross the Catalan plateau between two refuges; and from there, you descend through Mediterranean scrub oak toward Canigou's foothills.
Bouillouses to Carança
The Catalan High Country
Off the high plateau, across the Cerdagne, past a high-altitude railway, and back up to a refuge at the head of a remote valley.
Carança to Vernet-les-Bains
Beneath Canigou
The long descent — Pic du Canigou to your right, the Mediterranean closing in below, and the vegetation shifting from pine to scrub oak.
— Now Make It Yours —
Find Your GR10 Section 7: Mérens to Vernet les Bains
Most people walk it in 6 days. Some want longer to take it all in. Others want the challenge of doing it quicker. Pick the trip that suits you — or customise yours below.
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Guidebook authors on every trail
72-hour confirmation or no charge
Refund promise if we can't deliver
Build Your GR10 Section 7: Mérens to Vernet les Bains Adventure
Choose your pace and group size — we'll do the rest.
Your Adventure
Duration
7 days / 6 nights
Daily Distance
~14 miles/day
Party Size
2 people
What's Included:
- Hotels or guesthouses with breakfast at each overnight stop
- Custom Door-to-Door Route
- Big Trail Adventures App
- Your own personalised Trail Book
- On-trail support
Per person:
—
Trip total:
—
Deposit today:
—
Your Adventure
Duration
7 days / 6 nights
Daily Distance
~14 miles/day
Party Size
2 people
What's Included:
- Hotels or guesthouses with breakfast at each overnight stop
- Custom Door-to-Door Route
- Big Trail Adventures App
- Your own personalised Trail Book
- On-trail support
Per person:
—
Trip total:
—
Deposit today:
—
Included with every trip
Your personalised
Trail Book
Everything you need for every day of your trail — built around your exact itinerary. Your route, your accommodation, your packing list. Ready before you leave, works offline when you're out there.
Tonight's accommodation
Check-in time, room type, phone number and directions — all in one place
Day-by-day trail description
Route map, elevation profile and written description for each stage
Packing list and pre-trip checklist
Everything you need, nothing you don't. Tick items off as you go
Works offline
Open it once with data and it's yours — no signal needed on the trail
Included with every trip
Your route on every device you use
Your custom GPX file is built around your exact itinerary — day by day, door to door. Load it onto any device or app before you set off and navigate with confidence.
Works with
Talk to a Specialist
Knows the trail. Plans yours.
Craig
Trail Specialist
The GR10's eastern end is what I point people to when they've done a long English path and want something with proper altitude. Don't try to compress it — six days, not four, gives you time on the cols rather than just over them. Plan for refuge nights and pack a sleeping bag liner.
Craig has spent over ten years in adventure travel — most of it talking walkers through trails like this one. He's helped hundreds of people plan their section of the GR10, knows where they typically underestimate the climb out of Mérens, and has the calls in his pocket from people who've walked it the week before.
Ask Craig about the GR10 Section 7: Mérens to Vernet les Bains
If you want to talk through your timing, your fitness, your pace, or anything the planner can't answer — call. Most of our customers do, and Craig's the one who'll answer.
The Practical Side
Before You Book
The things walkers ask us most often — answered plainly, so you don't have to ring to find out.
How fit do I need to be?
You'll want to be comfortable walking 14 to 19 kilometres a day with sustained climbing — sometimes over 1,000 metres of ascent in a single day — and steady on your feet at altitude. The Hiker pace gives you six days to cover the 85 kilometres. The Explorer pace is the same six days, because the refuge spacing decides the rhythm of the walking days rather than the planner.
When should I walk it?
June to September is the trail's best window. Late June and September are quietest, with the refuges open and the weather generally stable. July and August are the warmest and busiest. May and October are possible but unreliable — snow can linger on the cols above 2,000 metres into early June, and the high refuges close in October. Avoid the winter months entirely.
Do you include luggage transfer?
Yes for the road-accessible stops — Mérens, Bolquère or Planès, and Vernet-les-Bains — your bag is moved between them, up to 20 kg per bag. The mountain refuges at Bésines, Carança, and Py aren't road-accessible, so you'll carry a daypack on those nights with what you need for the next 24 hours. We'll talk you through what to take and what to leave with the transfer.
What kind of accommodation do you book?
Small hotels, family-run gîtes d'étape, and mountain refuges — never chains. In the villages (Mérens, Bolquère, Planès, Vernet-les-Bains) you'll have a private room with breakfast. The high-mountain refuges at Bésines, Carança, and Py offer dormitory beds and half-board: dinner, breakfast, and a packed lunch on request. Pillows and duvets are provided; you'll need to carry a sleeping bag liner.
Can I walk it solo?
Yes — and many do. The GR10 is well-signed throughout with red and white waymarks, the route doesn't require navigation skills beyond following the marks, and you'll meet other walkers at the refuges most evenings. Solo walkers need to book the refuges well ahead in July and August: single beds in dormitories sell out fast. Single-occupancy rates apply in the village hotels.
What's the realistic total cost?
Our Classic package starts at £749 per person for the six-day Hiker pace, based on two people sharing. That covers accommodation, luggage transfer where the trail allows, planning, your trail book, and on-trail support. On the ground, budget €30 to €40 a day for lunches, drinks, and any extras at the refuges. Allow for travel to Mérens and from Vernet-les-Bains — the nearest airports are Toulouse and Perpignan.
Still not sure? Ring us on 0131 560 2740 — Craig usually answers.
Still Thinking?
Speak to Craig
If you've scrolled this far, we need to help you get onto this trail. The bit the planner can't help with — "is the pace right for me?", "is August really that busy?", "can we add a rest day in Keswick?" — that's a two-minute phone call. Most people who book the GR10 Section 7: Mérens to Vernet les Bains ring first.