View of Lake Laach – Trass caves loop from Niederzissen

Mountain biking trails

View of Lake Laach – Trass caves loop from Niederzissen

Moderate

4.0

(2)

riders

View of Lake Laach – Trass caves loop from Niederzissen

03:16

35.6km

750m

Mountain biking

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary. The starting point of the route is accessible with public transport.

Last updated: August 3, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Rhein-Ahr-Eifel

Waypoints

Start point

Bus stop

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9.54 km

Lydia Tower — View of Lake Laach

Highlight • Viewpoint

The Lydiaturm directly north of the Laacher Lake offers the best view across the lake to the Maria Laach Monastery. The steep climb from the lake up to the tower is definitely worth it and this detour should be made. The reward is located at the foot of the rise right on the lake gastronomy.

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9.79 km

Waldhütten Observation Tower Trail

Highlight • Trail

Nice trail, advantage you could temporarily avoid the hiker and with skill, you can combine several trails with this trail in Komoot.

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10.6 km

View of Lake Laach

Highlight • Viewpoint

Every break at this beautifully situated lake is recommended.

Even today when it rained I enjoyed the view for five minutes!

⭐⭐⭐⭐⭐

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13.5 km

Former boarding school at Lake Laach

Highlight • Historical Site

Interesting ruin, nice view

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18.4 km

Root and Rock Trail in Rhein-Ahr-Eifel

Highlight (Segment) • Trail

Very easy at the beginning, but then it lives up to its name.

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19.3 km

Relaxed ascent along the stream (S0)

Highlight (Segment) • Trail

Loose and cozy driveway

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23.2 km

Viewpoint

24.6 km

Trass caves

Highlight • Cave

"The sky in the Brohl Valley darkened as the Laacher See volcano erupted just five kilometers away. A blazing-hot mixture of lava particles and gases shot into the atmosphere at intervals. Each time the eruptive column collapsed, the material raced through the surrounding valleys as if on a cushion of air – ash and lava particles filled the valleys up to 60 meters high. The once loose materials of the pyroclastic flow have, over time, baked into a rock known in our region as "trass." The Romans already mined trass in the Brohl Valley and used it, among other things, for house construction. Finely ground, with the addition of lime and water, it produces a mortar that hardens even underwater. It is likely that it was the Dutch who promoted mining in the Brohl Valley since the 16th century, as trass is ideal for building dikes and harbor facilities. They were also the ones who gave the volcanic cement its name: "Tyrass" is Dutch for "glue." The trass walls you see from here have been hollowed out by mining and can be visited. Due to their poor quality, they were no longer of interest for mining and today are an impressive testament to the massive pyroclastic avalanche that once filled the entire valley.
eifel.info/a-trasshoehlen

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