GR10 Pyrenees: What It Is and How to Hike a Section
The GR10 crosses the French Pyrenees coast-to-coast in about 45 days over 55 official stages. What the trail is and how to find a realistic section to hike.
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As of 2026, the GR10 is France's long-distance trail across the entire Pyrenees, running roughly 900km from Hendaye on the Atlantic coast to Banyuls-sur-Mer on the Mediterranean (Cicerone, "GR10: Everything You Need to Know", retrieved 2026-07-28). Fit through-hikers typically need around 45 days to finish it in one go, which is why almost nobody with a normal amount of vacation time attempts the whole thing. The realistic approach for most visitors is section-hiking: picking one week or two-week stretch, most commonly around Lourdes, Saint-Lary-Soulan, or Gavarnie, and treating the rest of the trail as something for a future trip.
- Full length: about 900km (some sources cite up to 955km) with roughly 50,000m of cumulative ascent across the crossing (Cicerone, "GR10: Everything You Need to Know", retrieved 2026-07-28).
- Full through-hike time: around 45 days for a fit, mountain-experienced hiker; many take 6 to 7 weeks.
- Official stage count: 55 stages in the standard FFRandonnée topoguide breakdown, each running 7 to 27km.
- Best sections for first-timers: the Néouvielle-to-Luchon stretch and the days around Gavarnie and Cauterets, both reachable from towns already covered in our French Pyrenees itinerary.
- Season: summer (June through September) is the reliable window; snow can linger above 1,800-2,000m into May.
- Waymarking: red-and-white GR paint flashes throughout, well maintained and easy to follow without a dedicated GPS track.
What the GR10 actually is
The GR10 (Grande Randonnée 10) is one of France's national long-distance footpaths, and it's the one that follows the Pyrenees from ocean to sea. It starts at Hendaye on the Basque coast, tracks the French side of the range roughly parallel to the Spanish border, and finishes at Banyuls-sur-Mer on the Mediterranean, near the Spanish frontier at Cerbère (Wikipedia, "GR 10", retrieved 2026-07-28).
Unlike the GR20 in Corsica, which is short, brutal, and largely above the treeline, the GR10 is long, varied, and passes through actual villages most nights. It dips through valleys, climbs over passes, and threads between the ocean-facing Basque hills in the west and the high 3,000-meter peaks around the Néouvielle and Vignemale massifs further east. The FFRandonnée publishes the route as a set of official topoguides covering the trail in sections (FFRandonnée boutique, "GR10, la traversée des Pyrénées", retrieved 2026-07-28), with 1:50,000 maps and stage-by-stage notes, which remain the standard reference for planning any part of it.
If you're weighing the GR10 against France's other marquee long trail, our hiking in France guide and the dedicated GR20 Corsica guide cover how the two compare for difficulty and logistics. The short version: the GR20 is harder per kilometer and more exposed, the GR10 is longer overall and more forgiving day to day.
Why does almost nobody through-hike the whole thing?
Because 45 days is a genuinely rare amount of consecutive vacation time, and the trail doesn't reward rushing it. Even hikers who are otherwise strong and mountain-fit report the full crossing taking six to seven weeks once refuge availability, weather delays, and resupply days are factored in (Cicerone, "Trekking the GR10", retrieved 2026-07-28). That's before accounting for the logistics of getting to Hendaye, getting home from Banyuls-sur-Mer, and the toll that six-plus weeks of daily mountain walking takes on joints and gear.
Most people who hike meaningful stretches of the GR10 do it the way most people hike any long-distance trail: in sections, over multiple trips, sometimes over multiple years. This isn't a compromise so much as the standard way the trail gets walked by anyone without a sabbatical. You pick a stretch that matches the days you have, base yourself in a town at one end, and treat the rest of the GR10 as a trail you're chipping away at rather than a single expedition.
Section-hiking is the normal way to do this trail
Guidebooks structure the GR10 in stages precisely because most readers are planning a week or two, not a full crossing. Pick a stage cluster near a town you're already visiting rather than trying to force a start-to-finish plan into a normal trip length.
Which section should a first-timer with one to two weeks pick?
For a first GR10 trip, the central Pyrenees between Cauterets and Bagnères-de-Luchon gives the best return on a limited number of days. This stretch runs through the Néouvielle Nature Reserve, past a chain of glacial lakes, and connects directly to towns already set up for hikers: Saint-Lary-Soulan, Luchon, and Gavarnie sit within a short drive of trailheads along this section, and the same towns anchor our French Pyrenees itinerary.
A one-week plan realistically covers 4 to 6 daily stages, roughly 60 to 100km depending on terrain and rest days, which is enough to feel the trail's real character (passes, cirques, high lakes) without the grind of the full crossing. A two-week plan can stretch from Cauterets through to Luchon and beyond toward the Ariège, adding lower-traffic valleys and a genuine sense of covering ground.
The GR10 corridor through the central Pyrenees: Lourdes, Gavarnie, Saint-Lary-Soulan, and Foix
- Lourdes
- Gavarnie
- Saint-Lary-Soulan
- Foix
Gavarnie itself is worth building a few days around even outside a GR10 section hike. The trail passes close to the Cirque de Gavarnie, and combining a GR10 stage with the shorter cirque walk (roughly 2.5 to 3 hours round trip on a well-maintained path) gives a strong two-in-one day without extra driving.
Difficulty and waymarking on the GR10
The GR10 is a moderate-to-strenuous trail overall, but it's rarely technical. Daily stages average around 1,000m of climb, which is real mountain hiking, but the tread itself is a footpath rather than scrambling terrain, and most stages don't require ropes, via ferrata gear, or exposed ridge walking the way some GR20 sections in Corsica do.
Waymarking is one of the trail's genuine strengths. The GR10 uses the standard French GR system of red-and-white paint flashes on trees, rocks, and posts, applied consistently and maintained by FFRandonnée volunteers and regional hiking clubs. On a clear day, a hiker with a topoguide or a basic offline map can follow the trail without much difficulty. The exceptions are above the treeline in poor visibility, where fog or low cloud can hide the next flash, and a few notoriously vague junctions that guidebooks flag by name. Carrying a GPS track as backup, even if you don't rely on it day to day, is standard practice rather than overkill.
Weather above 1,800 to 2,000 meters changes fast
Afternoon storms build quickly in the high Pyrenees even on clear mornings, and several GR10 stages spend hours above that elevation. Start early, check the forecast the night before, and carry a warm layer even in July.
When is the best season to hike the GR10?
Summer, from June through September, is the reliable window for most of the trail, and July through August is when the highest passes are most consistently clear of snow. This is also, unsurprisingly, the busiest period: refuges book up, popular day sections near Gavarnie see real crowds, and towns like Saint-Lary-Soulan run at their fullest capacity.
April and May look tempting on paper because valleys are green and quiet, but snow commonly lingers above roughly 1,800 to 2,000m into May, and some passes stay genuinely difficult or dangerous without winter mountaineering experience and gear well into early June in a heavy snow year. Early or late shoulder-season sections should stick to lower valley routes rather than high passes unless you've confirmed current conditions with a local refuge or the FFRandonnée. September is often the sweet spot: snow is gone, crowds have thinned from the August peak, and days are still long enough for full stages. See the best time to visit France for how this window compares to the rest of the country.
How do I get to a GR10 starting point?
Most section hikes in the central Pyrenees start from a town reachable by train plus a short transfer. Lourdes has the best rail connections in the region and works as the practical gateway for the Gavarnie, Cauterets, and Luz-Saint-Sauveur trailheads, and it's covered in detail in our Lourdes travel guide. From Lourdes, local buses and taxis cover the last leg into the mountains, since the trailhead villages themselves aren't directly on the rail network.
If you're coming from further afield, our guide to getting to Occitanie covers the wider regional transport picture, including which airports and rail lines actually serve this side of the Pyrenees. A car gives more flexibility for reaching Saint-Lary-Soulan or Luchon directly, since the valleys here run parallel to each other rather than connecting by public transport.
How does the GR10 fit with the rest of the site's Pyrenees content?
If you've already read our French Pyrenees itinerary, the GR10 sections described there (Cauterets to Luchon via the Néouvielle Nature Reserve) are the same stretch recommended here for first-timers. That guide is built around towns and day trips with hiking as one component; this one goes deeper on the trail itself for readers specifically planning a GR10 section. Read both together if you're building a hiking-focused Pyrenees trip: the itinerary guide for where to stay and what else to see, this one for how much of the GR10 to actually plan for.
Sources
- Cicerone, "GR10: Everything You Need to Know", retrieved 2026-07-28
- Cicerone, "Trekking the GR10", retrieved 2026-07-28
- Wikipedia, "GR 10", retrieved 2026-07-28
- FFRandonnée boutique, "GR10, la traversée des Pyrénées", retrieved 2026-07-28
Frequently asked questions
The GR10 runs roughly 900km from Hendaye on the Atlantic coast to Banyuls-sur-Mer on the Mediterranean, with some sources citing figures up to about 955km depending on route variants and rerouted sections. Total cumulative ascent across the crossing is roughly 50,000 meters.
Yes, but only a section, not the full trail. A one-week plan realistically covers 4 to 6 daily stages, roughly 60 to 100km, which is enough to experience passes, cirques, and high lakes without attempting the full 45-day crossing.
No, the GR10 is generally less technical day to day. It's longer overall, but stages are mostly footpath rather than scrambling terrain, unlike several exposed, rocky sections on the GR20. See our GR20 Corsica guide for a direct comparison.
Most sections are hiked solo or in small groups without a guide, thanks to reliable red-and-white waymarking and widely available topoguides. A guide adds value mainly for high-pass sections in shoulder season or for hikers new to multi-day mountain navigation.
Saint-Lary-Soulan and Bagnères-de-Luchon are the two most practical bases for the central Pyrenees stretch, both within a short drive of GR10 trailheads. Lourdes works as the wider rail gateway if you're arriving without a car.
Avoid high passes above roughly 1,800 to 2,000 meters from late autumn through most of spring, since snow can linger into May in a heavy year. June through September is the reliable window, with July and August the busiest.
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