Althaus made her debut in the Continental Cup on August 10, 2008 in Bischofsgrün . At the German Women's Ski Jumping Championships in Oberhof in 2008 , Althaus achieved 10th place in the individual and, together with Sarah Pöppel as Team Bayern I, 7th place. On January 21, 2009 she reached the points for the first time in Toblach and with twelfth place her best result so far. The 2008-09 season ended Althaus on the 55th place in the Continental Cup standings. At the 2010 OPA games in Eisenerz she was runner-up. In the 2010/11 season she achieved 24th place at an FIS ski jumping event in Pöhla . In the further course of the season he came 19th in the Continental Cup in Hinterzarten . At the end of the season she was eighth in her second OPA game in 2011 in Baiersbronn .
On July 13, 2013 she made her debut in the FIS Cup in Villach , took third place and came second a day later. At the 2013 Summer Grand Prix she was able to achieve the podium for the first time with third place in Nizhny Tagil , and with 156 points she finished seventh in the overall standings. At the beginning of the 2013/14 World Cup season she finished fourth in the mixed team in Lillehammer and Tchaikovsky . In her third participation in the 2014 Junior World Championships in Val di Fiemme, she finished fifth in the individual and fourth in the team. She finished 23rd at the Olympic premiere of women's ski jumping. She won two FIS Cup competitions in Villach in summer 2014 and came second at the 2014 Summer Grand Prix in Almaty .
In the 2016/17 season , Althaus celebrated its first World Cup podium in Sapporo . On February 12, 2017, she achieved her first World Cup victory in Ljubno , but this was helped by the absence of favorites like Sara Takanashi or Yūki Itō , who were preparing for the Olympic dress rehearsal in Pyeongchang . At the Nordic World Ski Championships 2017 in Lahti , she finished eighth in the individual competition on the normal hill, in the mixed team competition she was not used as part of the reigning world championship team. At the end of the season she finished fourth in the overall ranking, her best World Cup result to date.
On August 11, 2017, she scored her first victory in a Summer Grand Prix jumping competition in Courchevel ahead of Sara Takanashi and Yūki Itō . At the beginning of the 2017/18 World Cup season , she achieved her second and third individual World Cup victory as part of the first-ever Lillehammer Triple . With these two wins and another second place she decided the overall ranking of the Lillehammer Triple for herself. At the 2018 Winter Olympics in Pyeongchang, she won the silver medal behind Olympic champion Maren Lundby on February 12, 2018 and was awarded the Silver Laurel Leaf on June 7, 2018. At the first World Cup station after the Winter Olympics in Râşnov , she achieved her third World Cup victory of the season. She finished the season with 928 points in second place in the overall World Cup behind Maren Lundby.
At the start of the Ski Jumping World Cup 2018/19 , Althaus managed to win the Lillehammer Triple 2018 again with two fourth places and one victory and to take the lead in the overall World Cup. After winning two more World Cup victories on the Les Tuffes normal hill in Prémanon , France , she made it onto the podium six times in the subsequent World Cups. In addition, she was able to celebrate the first World Cup victory of a German team on the Zaō hill in Yamagata, Japan, together with Juliane Seyfarth , Ramona Straub and Carina Vogt . She was able to confirm this success at the second team competition of the season in Ljubno together with Vogt, Anna Rupprecht and Seyfarth. As the overall World Cup runner-up, Althaus traveled to Seefeld for the 2019 Nordic World Ski Championships at the end of February . There she won the world championship title in the team competition held for the first time at a world championship together with Seyfarth, Straub and Vogt before Austria and Norway. In the individual competition, she was runner-up in the world championship, 0.5 points behind Norwegian Maren Lundby, with top marks in both rounds but with poor posture marks . She won the final mixed team competition with Markus Eisenbichler , Juliane Seyfarth and Karl Geiger ahead of the teams from Austria and Norway.
↑ Press release of the Office of the Federal President of June 7, 2018: ... On June 7, 2018, Federal President Frank-Walter Steinmeier will award the German medal winners of the 2018 Winter Olympics ... with the Silver Laurel Leaf ...