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France

Bourgogne-Franche-Comté

Lons-Le-Saunier

Foncine-Le-Bas

The ghost tunnel! – Syam Forge loop from Foncine-le-Bas

Routes

Mountain biking trails

France

Bourgogne-Franche-Comté

Lons-Le-Saunier

Foncine-Le-Bas

The ghost tunnel! – Syam Forge loop from Foncine-le-Bas

Moderate

4.4

(16)

riders

The ghost tunnel! – Syam Forge loop from Foncine-le-Bas

04:06

45.2km

890m

Mountain biking

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary. The starting point of the route is right next to a parking lot.

Last updated: June 21, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc naturel régional du Haut-Jura

Waypoints

Start point

Parking

Get Directions

663 m

The ghost tunnel!

Highlight • Other

180m long. Don't forget your light.

Tip by

3.27 km

Saine River Waterfalls

Highlight • Waterfall

Awesome waterfalls in a very deep gorge. Follow the trail to get closer to the beginning of the waterfalls.

Tip by

15.0 km

Syam Forge

Highlight • Other

This forge is a part of the local industry heritage. This factory was powered by the water ernergy of the Ain river.

Tip by

25.5 km

Ain Gap

Highlight • Other

beautiful

Translated by Google •

Tip by

25.8 km

Fortified gate

Highlight • Other

This door was intended to levy the tax related to the salt trade (This dates a little).

Translated by Google •

Tip by

29.8 km

Butterfly Spring and Waterfalls

Highlight • Waterfall

A spring, with waterfalls and a pool. Some plants look like butterflies.

Tip by

41.5 km

Old Tramway Tunnel in Parc naturel régional du Haut-Jura

Highlight • Structure

Beautiful path on the old railway line

Translated by Google •

Tip by

44.0 km

The Bief de la Ruine waterfall is located in the spectacular Malvaux Gorge. One of the most astonishing features of this waterfall is the fact that it only comes alive after heavy rainfall or during snowmelt. When it dries, it gives way to the spectacle of the carved stone, revealing the "Creux des Joyaux," a natural cave where the water swirls with varying degrees of vigor, polishing a multitude of limestone pebbles thanks to the force of its current.

Translated by Google •

Tip by

45.2 km

End point

Parking

Way Types & Surfaces

Way Types

32.7 km

9.38 km

1.73 km

1.40 km

Surfaces

27.1 km

7.89 km

5.40 km

3.78 km

1.08 km

Elevation

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

Highest point (810 m)

Lowest point (530 m)

Weather

Tuesday 14 July

27°C

13°C

75 %

Additional weather tips

Max wind speed: 19.0 km/h

to get more detailed weather forecasts along your route

Comments

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The ghost tunnel! – Syam Forge loop from Foncine-le-Bas

The ghost tunnel!

Saine River Waterfalls

Syam Forge

Ain Gap

Fortified gate

Butterfly Spring and Waterfalls

Old Tramway Tunnel in Parc naturel régional du Haut-Jura

Bief de la Ruine Waterfalls

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