Holzknecht was born in Sondalo. He started ski mountaineering in 2001 and competed first in the same year. He became a member of the national team in 2002.
Selected results
2004:
3rd, World Championship single "juniors" class race
2007:
6th, European Championship vertical race
8th, European Championship single race
2008:
1st, Trofeo Angelo Gherardi
7th, World Championship team race (together with Ivan Murada)
2009:
1st, European Championship relay race (together with Dennis Brunod, Manfred Reichegger and Damiano Lenzi)
2nd, European Championship team race (together with Guido Giacomelli)
3rd, European Championship single race
3rd, European Championship combination ranking
3rd, Valtellina Orobie World Cup race
2010
1st, World Championship relay race (together with Damiano Lenzi, Dennis Brunod and Manfred Reichegger)
3rd, World Championship team race (together with Damiano Lenzi)
2011:
2nd, World Championship team race (together with Manfred Reichegger)
2012:
1st, European Championship team, together with Manfred Reichegger
10th, European Championship single
1st, Sellaronda Skimarathon (together with Michele Boscacci)
2nd, 2012 Crested Butte Ski Mountaineering Race, single and total ranking
