Sunken viaduct – Magnificent view of the lake loop from Lac de Serre-Ponçon

Hiking trails & Routes

France

Provence-Alpes-Côte D'Azur

Provence

Provence-Alpes-Côte d'Azur

Gap

Chorges

Sunken viaduct – Magnificent view of the lake loop from Lac de Serre-Ponçon

Moderate

4.7

(120)

708

hikers

Sunken viaduct – Magnificent view of the lake loop from Lac de Serre-Ponçon

03:04

10.5km

270m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: August 21, 2026

Waypoints

Start point

Bus stop

Get Directions

395 m

Sunken viaduct

Highlight • Other

Old railway viaduct. Was never equipped with a rail, then submerged by the dam.

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839 m

Trémouilles Beach

Highlight (Segment) • Beach

Very nice beach with lots of trees

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2.25 km

Lake Serre-Ponçon Swimming Bay

Highlight • Beach

Small bay on the circular path that invites you to a swim.

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2.27 km

View of Turtle Island

Highlight • Other

If the lake has a higher level in spring, the two islands are only floating to reach. In late summer, however, you can walk over on foot.

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2.72 km

Strand, Badeplatz

Highlight • Other

A good mix of relaxation and activity. A tour around the lake is worthwhile, as is a short hike and then a "lake break" with a refreshing swim!

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5.99 km

Magnificent view of the lake

Highlight • Lake

This is where you will have a breathtaking view of the Serre Ponçon lake. By going to this viewpoint, you will be able to admire the turquoise waters of the …

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8.23 km

Path through rugged mountainside

Highlight (Segment) • Other

10.5 km

End point

Bus stop

Way Types & Surfaces

Way Types

8.42 km

1.15 km

480 m

476 m

Surfaces

7.17 km

1.53 km

831 m

721 m

213 m

< 100 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (940 m)

Lowest point (780 m)

Weather

Sunday 11 October

19°C

7°C

0 %

Additional weather tips

Max wind speed: 6.0 km/h

to get more detailed weather forecasts along your route

Comments

June 24, 2024,Lac Serre-Ponçon

Superb hike with a beautiful view of Lake Serre-ponçon. Even more beautiful when the sun is out 😀

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August 18, 2023,Vue magnifique sur le lac – Belvédère boucle au départ de Pontis

Indicated hike of 3 hours and a few but with some photo stops and a few micro-pauses in the climbs in full sun under about 38 degrees it takes about 4 hours.
Magnificent landscape!

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June 13, 2023,🇨🇵 Hautes Alpes - "Lac de Sere Ponçon - Viaduc de Chandeloube"

The (or the) viaduct is part of an uncompleted railway line between Chorges and Barcelonnette, which finally "went under" when the reservoir was built in the French Alps around 1960. When the water level is normal, the S-shaped viaduct is almost completely flooded (viaduc submerge). Same today. It is 234 m long and has 14 arches.
After a rainy night, …

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