Le Trou de l'Arnus – A Hidden Waterfall Gem in Midi‑Pyrenees, France

Discover the secret cascade that drops 20 m into a natural pool, tucked away near Salles‑la‑Source. Perfect for adventurous hikers, photographers, and anyone craving a quiet slice of French wilderness.

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Introduction

If you think the Midi‑Pyrenees region is only about towering peaks and historic villages, think again. Nestled in the forested hills of Salles‑la‑Source lies Le Trou de l'Arnus, a 20‑metre waterfall that feels more like a well‑kept secret than a tourist hotspot. Its name—the Hole of the Arnus—hints at the deep, round basin that catches the water before it tumbles into the valley below. With delicate access via the confluence of the Créneau stream, this waterfall rewards the intrepid traveler with crystal‑clear spray, echoing sounds, and a sense of pure, untouched nature.

Whether you’re mapping out a weekend road‑trip through the Midi‑Pyrenees, planning a day‑hike from Salles‑la‑Source, or simply hunting the most photogenic French waterfalls, Le Trou de l’Arnus should be at the top of your list.

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About Le Trou de l'Arnus

• Type: Waterfall 🌊
• Location: Salles‑la‑Source, Midi‑Pyrenees, France
• Coordinates: 44.435413 N, 2.514700 E
• Height: 20 m (≈ 66 ft)
• Altitude: Not officially recorded

Le Trou de l’Arnus is a cascade waterfall that drops straight into a natural plunge pool, creating a striking vertical sheet of water framed by moss‑laden rocks. The water source is the Créneau stream, which merges with a smaller tributary right at the waterfall’s base. This confluence makes the approach a bit tricky—hikers must navigate a narrow, sometimes slippery path that weaves between boulders and low vegetation.

While there is no dedicated Wikipedia entry, local hikers and nature lovers speak of the site as a “hidden treasure” of the Midi‑Pyrenees. Its relative obscurity has helped preserve the surrounding forest, making the waterfall an ideal spot for birdwatching, quiet reflection, and low‑impact photography.

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How to Get There

By Car

1. Start in Rodez (the nearest large city).
2. Take the A75 autoroute north toward Albi and exit at Le Truel.
3. Follow the D840 east for about 12 km, then turn right onto the D68 toward Salles‑la‑Source.
4. In Salles‑la‑Source, look for the signposted “Sentier du Trou de l’Arnus” (the trailhead is on the left side of the main road, just past the town hall).

Parking is available in a small municipal lot near the trailhead (capacity ~10 cars). Arrive early in the morning, especially in summer, to secure a spot.

By Public Transport

• Train: The nearest SNCF station is Rodez. From there, catch a regional bus (line 23) to Salles‑la‑Source (approx. 45 min).
• Bus: The Salles‑la‑Source stop is a short 5‑minute walk from the trailhead.

On Foot

If you’re already exploring the Aveyron countryside, you can join the GR 65 pilgrimage route (the Way of St. James) that passes near Salles‑la‑Source. A side‑track leads directly to the waterfall.

Key tip: The path to the waterfall is delicate; wear sturdy hiking boots with good grip, and bring a walking stick for extra stability on the wet rocks.

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Best Time to Visit

Season	Conditions	Why Visit
Spring (Mar‑May)	Water flow is strongest from snowmelt; temperatures 10‑18 °C	Lush vegetation, vibrant wildflowers, dramatic water volume
Summer (Jun‑Aug)	Warm, sunny days; water level may drop slightly	Ideal for swimming in the plunge pool; longer daylight for photography
Autumn (Sep‑Nov)	Mild weather, colorful foliage, fewer crowds	Golden light and crisp air enhance the waterfall’s texture
Winter (Dec‑Feb)	Possible frost, reduced flow, occasional ice	For the adventurous—frozen cascades create a surreal landscape (access may be limited)

Overall recommendation: Late spring to early autumn offers the best balance of water volume, comfortable hiking temperatures, and accessible trails.

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What to Expect

The Hike

• Distance: Approximately 1.2 km (round‑trip) from the trailhead to the base of the falls.
• Elevation gain: Minimal (under 100 m), but the terrain can be uneven and slippery near the water.
• Duration: 45 – 60 minutes at a relaxed pace, longer if you stop for photos or a dip.

The Waterfall Experience

• Visuals: A 20‑metre sheet of water plunges into a deep, turquoise pool surrounded by mossy granite. Sunlight often creates rainbows in the mist.
• Sounds: The roar of the cascade blends with the gentle murmur of the Créneau stream—perfect for meditation or a quiet break.
• Swim: The plunge pool is safe for a quick swim in summer, but be mindful of the current near the waterfall’s edge.

Wildlife

• Expect to see European robin, blackcap, and occasional goldfinch.
• The forest floor is home to hedgehogs, moles, and a variety of butterflies during warmer months.

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Nearby Attractions

While Le Trou de l’Arnus is the star, the surrounding area offers several natural points of interest within walking distance. Below are the closest spots (all located in the Midi‑Pyrenees region). Click the links for more details or to add them to your itinerary.

Attraction	Type	Distance from Le Trou de l'Arnus	Link
Unnamed Waterfall	Waterfall 🌊	0 km (right at the same site)	Explore the nearby cascade
Spring A	Spring 💧	0.1 km	Visit Spring A
Spring B	Spring 💧	0.1 km	Visit Spring B
Secondary Waterfall	Waterfall 🌊	0.2 km	Explore the secondary waterfall
Local Fountain	Fountain ⛲	0.2 km	Check out the fountain

Tip: The two springs are excellent spots for a short rest—fresh mountain water flows continuously, and the surrounding moss makes a natural bench.

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Travel Tips

Tip	Details
Footwear	Waterproof hiking boots with good ankle support are essential.
Clothing	Layered clothing; a light rain jacket helps when you get close to the spray.
Safety	The approach to the waterfall can be slippery—use a trekking pole and watch your step.
Photography	Early morning or late afternoon light creates the most dramatic shadows and rainbows. Bring a polarizing filter to reduce glare on the water.
Leave No Trace	Pack out all trash, stay on marked paths, and avoid disturbing the natural vegetation.
Food & Water	Bring enough water (the springs are drinkable but may need filtration) and a packed lunch—there are no facilities on site.
Timing	Arrive before 10 am in summer to avoid the midday heat and the small crowd that gathers later.
Local Culture	Respect the quiet of Salles‑la‑Source; locals value the serenity of the area. A friendly “Bonjour” goes a long way.
Emergency	Mobile coverage can be spotty; carry a fully charged phone and note the nearest emergency number: 112 (EU emergency).
Parking	Free municipal parking is limited; consider car‑pooling or using public transport when possible.

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Final Thought

Le Trou de l’Arnus may not have the fame of the Cascades de Gavarnie, but its intimate charm, refreshing plunge pool, and secluded setting make it a must‑see for anyone exploring the Midi‑Pyrenees. Pack your hiking boots, follow the narrow trail by the Créneau, and let the waterfall’s mist welcome you into a quiet corner of French nature that few have discovered.

Happy travels, and may your journey to Le Trou de l’Arnus be as unforgettable as the cascade itself!