Steindl was born in Zermatt, where he worked as a carpenter before he earned his mountain guide diploma in 2011.
[2][3] On 23 August 2011 he climbed the Matterhorn in a record time of 2 hours 57 minutes,[4] and beat the record of Simon Anthamatten, Ernest Farquet, Marcel Marti and Florent Troillet from 2007.
[6] In 2018, he ran from Kirchplatz in Zermatt to the summit of the Matterhorn and back in 3:59:52 improving on his own previous record by 20 minutes.
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