The Langenwang forest hikers who lost two days in Austria

This is genuinely obscure and I only found it because I was going through an Austrian paranormal journal from the 90s. Two hikers, 1987, Mürzzuschlag area in Styria, set off on a well-marked trail. Their plan was a day hike. They came out of the forest 48 hours later convinced only a few hours had p……