Glacio-lacustrine sediments from the overdeepened lower Salzach Valley were investigated. A 30 m long core retrieved sediments that could be identified as the “Salzburger Seeton”. Single-grain luminescence dating methods were applied on six samples spread over the whole depth of the core. The depositional age of these sediments was calculated to be 18.6 ± 0.9 ka. This time frame suggests that at least some shallow parts were filled by post-LGM (Last Glacial Maximum) lacustrine fine sediments.