Already registered ? Log in
image utilisateur
rue de la République, Bellegarde-sur-Valserine
01200 Valserhône
Dinoplagne®, ENS de l'Ain
Dinoplagne®, ENS de l'Ain
Dinoplagne®, ENS de l'Ain
Dinoplagne®, ENS de l'Ain
Dinoplagne®, ENS de l'Ain
Dinoplagne®, ENS de l'Ain
Dinoplagne®, ENS de l'Ain

Dinoplagne®, ENS de l'Ain

The work to protect and enhance the Dinoplagne site® is finalized. Labeled Sensitive Natural Space by the Ain Department; Dinoplagne® is home to the longest track of dinosaur footprints !
To visit: reservation required.
Ain during the Mesozoic Era was paradise! Back then, the landscape resembled the enchanting coastline of the Bahamas today. It was a time when being a giant protected you from ferocious predators, such as theropods like Tyrannosaurus Rex – agile, meat-eating dinosaurs. 30 metres in length and weighing over 40 tonnes, the sauropod that walked through Plagne was one of these giants.

He left behind gigantic footprints, measuring over 2 metres in width, across a 1,000 square metre area of limestone rock. The size of the footprints and the length of the track contribute to the exceptional nature of the site – there’s nowhere else like it in the whole world.

The site of the dinosaur footprints was discovered in 2009 by geologists and biologists from Oyonnax. 3 successive paleontological searches, carried out between 2010 and 2012 by researchers from the French National Centre for Scientific Research (CNRS) and the University of Lyon, revealed 115 footprints over a distance of 155 metres - making this the longest sauropod trail in the world! The prints were fossilised 145 million years ago! A world record!

This discovery has enabled scientists to gather important data about the geology of the area, the history of the Jura Mountain range and the dinosaurs that once lived here as well as to improve methods for extracting information from footprints and trails and analysing the data revealed by the searches.

So, it’s not surprising that the site has been protected under the Sensitive Natural Areas program (ENS) since 2015.

Technical information

Route départementale 49 lieu-dit sur la croix
01130 Plagne
Lat : 46.18922Lng : 5.715123
0 m
25 d

6 Additional information

Location complements

*From Lyon or Bourg-en-Bresse via the A40 motorway: exit n° 9, take a left towards Bellegarde-sur-Valserine. At Moulin de Charix, turn left and follow the D49.

*From Haute-Savoie via the A40 motorway: take exit n° 10, turn left onto the D101 for 3km to join the D1084 towards Nantua. At Saint Germain-de-Joux, turn right and follow the D49.

*From the Jura region: from Belleydoux, take the D13 towards Echallon then the D49.


Phone : 04 50 48 48 68

Email :

Website :

Open period

From 29/06 to 28/08/2022 between 10 am and 6 pm.
Closed Monday and Tuesday.

From 31/08 to 18/09/2022, every Wednesday, Saturday and Sunday between 10 am and 6 pm.

Updated by

Office de Tourisme Terre Valserine - 08/09/2022
Report a problem


Adult: 12 €
Child : 8 €
Group adults: 10 €
Group children : 6 €.

Free entry for children Child entry valid for 4 - 12 years.
Group rate available for > 13 people.

New for 2022

New this year ! Dinoplagne is proposing guided tours in english in july and august every Friday at 10 am. When you book your tickets precise in the comments that you are interested !