Towards Lac d'Oô

de fr

A lovely walk gradually ascending towards the artificial Lac d'Oô and the large waterfalls that feed it.

Details

n°156366
Creation:
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Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 7.24 km
  • ◔
    Average duration: 3h 20 
  • ▲
    Difficulty: Moderate
  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 448 m
  • ↘
    Descent: - 444 m
  • ▲
    Highest point: 1,525 m
  • ▼
    Lowest point: 1,132 m
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Photos

the lake from the waterfall
Lake and waterfall at Lac d'Oo
A view of the valley and the car park below
Lake Oô still frozen

Description of the walk

Access: From Oô, follow the D76 and park in the Granges d'Astau car park.

(S/E) Head towards the end of the road, leaving Les Granges on your left, to pick up the path.

(1) The path climbs fairly gently for 1.5km, then twists and turns appear. Stay on the main path and leave the lane leading to the buildings on your right.

(2) Continue uphill until you reach a slightly downhill section. Continue for 100m.

(3) There is a small path on your right that leads to one of the exits from the dam.

(4) Turn around and return to the narrow path.

(3) Take the main path to the right as far as a bridge.

(5) Continue straight on towards the dam, skirting its bank for a short distance.

(6) Turn around and return to the bridge.

(5) Cross it and head towards the section overlooking the Auberge Refuge du lac d'Oô.

(7) Return the same way you came (S/E).

Waypoints

  1. S/E : km 0 - alt. 1,133 m - Car park - Les Granges d’Astau
  2. 1 : km 0.21 - alt. 1,150 m - Start of the trail
  3. 2 : km 2.41 - alt. 1,455 m - Path to buildings
  4. 3 : km 2.9 - alt. 1,498 m - Small path on the right
  5. 4 : km 2.98 - alt. 1,465 m - Dam outlet
  6. 5 : km 3.3 - alt. 1,489 m - Bridge - Neste d'Oô (rivière) - Affluent de l'One
  7. 6 : km 3.52 - alt. 1,516 m - Right bank - Lac d'Oo
  8. 7 : km 3.99 - alt. 1,525 m - Point dominating the > - Refuge du Lac d'Oô
  9. S/E : km 7.24 - alt. 1,132 m - Parking des Granges d'Astau. Close to the - Neste d'Oô (rivière) - Affluent de l'One

Notes

Take all the essentials you need for a mountain hike:
- food and drink
- protection from the weather (sun, rain, wind, cold, etc.),
- lighting (torch) in case the hike finishes late.

Worth a visit

During this walk, I saw many hikers in bivouac mode continuing beyond the point (6).
I refer you to the "Lac d'Espingo" hike
https://www.visorando.com/randonnee-lac-...
There were tents pitched near the hostel.

At the starting point at the Granges d'Astau, it is possible to get something to eat (certainly in summer).

Reviews and comments

4.7 / 5
Based on 98 reviews
Reliability of the description
4.8 / 5
Ease of following the route
4.9 / 5
Route interest
4.4 / 5
User 28782695

Overall rating : 5 / 5

Date of your route : Apr 13, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

An easy, very scenic walk with stunning views and the option to continue further up...

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User 27040457

Overall rating : 5 / 5

Date of your route : Sep 06, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Hike well described in the app.

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User 4035572

Overall rating : 5 / 5

Date of your route : Sep 08, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

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User 10007746

Overall rating : 4.7 / 5

Date of your route : Sep 02, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A beautiful, fairly easy hike. The path is wide and the climb is easy.
The lake is magnificent. Well worth discovering.

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User 7610973
• Edited:

Overall rating : 5 / 5

Date of your route : Sep 01, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Very beautiful lake but too crowded

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User 3372869

Overall rating : 5 / 5

Date of your route : Aug 29, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Perfect Visorando tour, thank you

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User 25592606

Error: "lac" should be "anglas"

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Laplante cedric
Laplante cedric

Overall rating : 4.7 / 5

Date of your route : Aug 18, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

The lake is truly beautiful
The route is unremarkable
Lots of people, more than I've ever seen before

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Noël31
Noël31
• Edited:

Overall rating : 4 / 5

Date of your route : Aug 13, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★☆☆ Average
Very busy route : Yes

A very shaded hike with few views. The GR is a very busy "highway". The lake is really beautiful and the colours were lovely in the sunshine.
It's best to wear good shoes, especially if you want to go to the waterfall.

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Randoman42
Randoman42

Overall rating : 4.7 / 5

Date of your route : Aug 10, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

Slow climb with a shaded path that was very busy on 10 August

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togola
togola

Overall rating : 5 / 5

Date of your route : Aug 04, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

The hike is easy and very pleasant, so obviously very popular in this sunny month of August!

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Ailesdange31
Ailesdange31

Overall rating : 5 / 5

Date of your route : Aug 03, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A beautiful hike with plenty of shade and few views, but the lake is really beautiful.
There were a lot of people on the route and the car park filled up very quickly.
The hike is accessible to all, but there are a few tricky spots.
Suitable footwear is essential, especially for the descent!
Thank you for this lovely route.

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ramaco
ramaco

Overall rating : 3.3 / 5

Date of your route : Jul 10, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★★ Very good
Route interest : ★★☆☆☆ Disappointing
Very busy route : Yes

Very accessible mountain walk. The round trip takes just 2 hours and 15 minutes as there are few opportunities to stop for photos and the slope is generally gentle, with no steps and few uneven sections, making the climb easy. Very pretty view at the start. The path to the lake is shaded, so there are no views of the valley, the stream or the mountains. The lake and waterfall are pretty, but it is still an artificial lake. Great for a family outing, but if you hike regularly in the mountains, don't stop at Lake Oo. Also, it was already quite busy at 10 a.m.

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fcmimi
fcmimi

Overall rating : 5 / 5

Date of your route : Jul 01, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

accessible and shaded

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8PTC1
8PTC1

Overall rating : 5 / 5

Date of your route : Mar 27, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Nice route, with a splendid finish at the lake

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