Routes

Route planner

Features

Product updates

Get the App

Login or Signup

Get the App

Login or Signup

Discover
Places to see

Caves

Germany

Rhineland-Palatinate

Ahrweiler

Burgbrohl

Trass Caves Trail

Discover
Places to see

Caves

Germany

Rhineland-Palatinate

Ahrweiler

Burgbrohl

Trass Caves Trail

Trass Caves Trail

Recommended by 1659 hikers out of 1717

Save

Share

  • More

  • Save

    Share

  • More

  • Take Me There

    Hikes here

    Best Hikes to Trass Caves Trail

    4.3

    (98)

    322

    hikers

    1. Trass Caves Trail – Trass Caves Brohltal loop from Wassenach

    10.9km

    03:01

    190m

    Intermediate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

    Navigate

    Send to Phone

    Intermediate

    Intermediate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

    Intermediate

    Intermediate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

    Intermediate

    Tips

    October 14, 2019

    "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

    Translated by Google •

      July 21, 2018

      Nice path through different caves / passageways. The Trass caves are a great experience for young and old.

      Translated by Google •

        October 26, 2017

        13,000 years ago, the Lacher See volcano erupted, so this rock was created. At that time, the Romans cut off large blocks of trass and shipped them across the Rhine to Italy. In the 1800s, trass was mined and processed into a kind of cement in the mills. Today you can see these caves.

        Translated by Google •

          Sign up for a free komoot account to get 44 more insider tips and takes.

          Sign up for free

          Details

          Informations

          Elevation 130 m

          Weather

          Powered by AerisWeather

          Today

          Monday 15 September

          20°C

          13°C

          10 %

          If you start your activity now...

          Max wind speed: 17.0 km/h

          Most visited during

          January

          February

          March

          April

          May

          June

          July

          August

          September

          October

          November

          December

          Loading

          Location: Burgbrohl, Ahrweiler, Rhineland-Palatinate, Germany

          Other Popular Places to Check Out

          Explore
          RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepacking
          Download the app
          Follow Us on Socials

          © komoot GmbH

          Privacy Policy