Once it’s warm enough the Sigmund Thun Klamm opens its gates and invites you to walks as well as extended hikes with detours to the Klammsee Reservoir and onto the Bürgkogel. But what happens to the Sigmund Thun Klamm in winter? Winter closure predominantly serves to protect the site. Some of the footbridges are dismounted to safeguard them from snow and ice and the associated damage. Additional maintenance measures are carried out as well. We have prepared a multimedia overview of the wintery gorge for you.