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Trass caves – Trass Caves Brohltal loop from Burgbrohl

Routes

Hiking trails & Routes

Trass caves – Trass Caves Brohltal loop from Burgbrohl

Hard

4.6

(38)

126

hikers

Trass caves – Trass Caves Brohltal loop from Burgbrohl

01:33

5.22km

150m

Hiking

Hard hike. Great for any fitness level. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is right next to a parking lot.

Last updated: April 15, 2026

Tips

Includes a segment that may be dangerous

A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.

After 2.63 km for 107 m

Waypoints

Start point

Parking

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598 m

Brohltalaue East Recreation Area

Highlight • Rest Area

On the Georoute U in Brohltal, you pass this artistically designed park. V. A. Kids will have fun here in summer!

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1.21 km

Wunschwald Forest Path

Highlight • Trail

Like in a fairy tale 🤩

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1.83 km

Trass Cliffs of Niederzissen

Highlight • Natural Monument

Slag ejection from the eruption of the Laacher See volcano.

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2.12 km

"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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2.33 km

Trass Caves Brohltal

Highlight • Cave

The Trasshöhlen and the Wolfsschlucht gorge, just a few minutes away, are the two absolute hiking highlights in the Brohltal valley.

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3.04 km

View of the Brohl Valley from Teufelsberg

Highlight • Viewpoint

There are several hiking trails in this area that pass this viewpoint. After the climb from the Trasshöhlen, this viewpoint may also serve as a short break for the less trained hiker.

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