Competition climbing In 2015, her first year of eligibility for the
IFSC Climbing World Cup, she placed seventh in the overall lead climbing standings. The same year, she also placed first in a Swedish bouldering event, the "La Sportiva Legends Only", ahead of
Shauna Coxsey,
Mélissa Le Nevé,
Juliane Wurm, and
Anna Stöhr. She also won the bouldering gathering
Melloblocco in 2015. In 2016, she won most of the IFSC competitions in which she participated. She won the World Cup in lead and combined disciplines, the World Championships in lead, and the World Youth Championships in lead and bouldering. Garnbret also won the Adidas Rockstars 2016 contest (an invitational contest for the world's best bouldering athletes), defeating
Jessica Pilz in the superfinal. She also won
Rock Master in 2016, and then again in 2018. In 2017, she won the World Cup in lead and combined disciplines, the combined title in the European Championships, and ranked second in bouldering in the World Cup and the European Championships. In 2018, she defended her World Cup titles in lead and combined disciplines and placed fourth in bouldering by winning two golds and one silver, after participating in just 3 out of 7 events (due to school commitments). Moreover, she won the World Championships in both bouldering and combined. She was close to also winning the Lead Climbing World Championships, where she earned the silver medal by topping the final route in 4 minutes and 38 seconds, just 11 seconds slower than Jessica Pilz, who won the Championship. In 2019, she dominated the bouldering World Cup by solving 74 problems out of 78 and winning every event throughout the season. Her win in the combined event qualified her for a spot at the
2020 Summer Olympics. Towards the end of 2019, she hired
Roman Krajnik as her personal coach. In 2021, she began the
2021 IFSC Climbing World Cup season with a win in bouldering at
Meiringen in April before finishing second in
Salt Lake City, ending her streak of bouldering World Cup wins at nine. In the same year, she became the first ever female Olympic champion in sport climbing, taking gold in the
women's combined event at the 2020 Summer Olympics. In April 2022, after her first bouldering World Cup victory in the
2022 IFSC Climbing World Cup season at Meiringen, Garnbret announced that she would skip the remaining bouldering events to focus on the European Championships and the lead events of the World Cup. At the 2022 European Championships in
Munich, Garnbret won gold in all three events – lead, bouldering, and combined – with the first two being the only titles she had never won before, thus completing the feat of winning every possible major title in sport climbing. In August 2023, Garnbret qualified for the combined event at the
2024 Olympics by winning the combined title in the
2023 World Championship. She also won the gold medal in the individual boulder event and the silver medal in the individual lead event, bringing her World Championship medal tally to ten, including eight gold. In August 2024, she successfully defended her Olympic gold after winning the boulder and lead combined event at the 2024 Olympics for her second Olympic victory. in Munich, Germany
Outdoor rock climbing In 2015, Garnbret
onsighted
Avatar, an graded
sport climbing route in Pandora, Croatia. The same year, she successfully climbed her first graded route by
redpointing Miza za šest at Kotečnik in her home country of Slovenia. In 2016, she
flashed La Fabelita in
Santa Linya, an graded sport climbing route. She was given
route beta by her countrywoman
Mina Markovič, and climbed the route in less than 15 minutes. In 2017, she went a step further and clipped the anchor of her first graded sport route,
Seleccio Natural, in Santa Linya, Spain. Just a few days later, she climbed her second 9a graded route,
La Fabela pa la Enmienda, also in Santa Linya. In November 2021, she onsighted
Fish Eye in
Oliana, Spain, which was the
world's first-ever female onsight of a consensus graded sport route in history. In March 2022, Garnbret made the
first female ascent of
Bügeleisen, an graded
bouldering problem in
Maltatal, Austria. On 12 May 2024, she returned to Maltatal and made the first female ascent of
Bügeleisen SDS, a
sit start variation that is graded at . == Rankings ==