Bouldering is a form of rock climbing that is performed on small rock formations or artificial rock walls without the use of ropes or harnesses. While bouldering can be done without any equipment, most climbers use climbing shoes to help secure footholds, chalk to keep their hands dry and to provide a firmer grip, and bouldering mats to prevent injuries from falls. Unlike free solo climbing, which is also performed without ropes, bouldering problems are usually less than six metres (20 ft) tall. Traverses, which are a form of boulder problem, require the climber to climb horizontally from one end to another. Artificial climbing walls allow boulderers to climb indoors in areas without natural boulders. In addition, bouldering competitions take place in both indoor and outdoor settings.
Adam Ondra is a Czech professional rock climber, specializing in lead climbing, bouldering, and competition climbing. In 2013, Rock & Ice described Ondra as a prodigy and the leading climber of his generation. Ondra is the only male athlete to have won World Championship titles in both disciplines in the same year (2014) and is one of the two male athletes to have won the World Cup series in both disciplines.
Ashima Shiraishi is an American rock climber. Shiraishi started climbing at the age of six at Rat Rock in Central Park, joining her father. Only a few years later, she quickly established herself as one of the top boulderers and sport climbers in the world. Her numerous accomplishments include first-place finishes in international competitions, and multiple first female and youngest ascents. Shiraishi is featured in several short documentary-style films, and is the subject of the documentary short "Return to the Red" (2012).
Daniel Woods is an American professional rock climber who specializes in bouldering, and who is considered one of the most important climbers in the history of bouldering. Woods has climbed over thirty boulder problems graded at or above 8C (V15). He has also won several competition bouldering events, such as the U.S. National Bouldering Championship and some international events. In March 2021, Woods achieved the first ascent of a low start to Sleepwalker V16 (8C+) which he named Return of the Sleepwalker and proposed the grade 9A (V17), only the second-ever route in history at that grade.
Brooke Raboutou is a French-American professional rock climber who specializes in competition climbing where she competes as part of the US National Team. She won the silver medal in the combined bouldering and lead climbing event at the 2024 Summer Olympics.
Alexander Megos is a German rock climber specializing in sport climbing, bouldering and competition climbing. In 2013, he became the first-ever climber to onsight a 9a (5.14d) graded route. He has made the first free ascent (FFA) of some of the hardest sport climbing routes in the world, including two 9b+ (5.15c) routes, four 9b (5.15b) routes, and several boulders with a boulder 8C (V15) rating.
Janja Garnbret is a Slovenian professional rock climber who specializes in sport climbing and competition climbing. She has won multiple competition lead climbing and competition bouldering events, two Olympic gold medals, and is widely regarded as the greatest competition climber of all time. In 2021, Garnbret became the first-ever female Olympic gold medalist in climbing, and successfully defended her title in 2024. With two gold medals, she is the most successful Slovenian athlete at the Summer Olympics. She is also the world's first-ever female climber to onsight an 8c (5.14b) graded sport climbing route.
Margo Hayes is an American professional rock climber from Boulder, Colorado. In 2016, she won both the competition bouldering and the competition lead climbing events at the IFSC Climbing World Youth Championships in Guangzhou (China). In 2017, she became the first woman in history to climb a 9a+ (5.15a) graded route, and in 2019, became the first woman to complete the "9a+ Trilogy".
Jakob Schubert is an Austrian professional rock climber, specializing in competition climbing, sport climbing, and bouldering. He is a four-time World Champion and three-time World Cup winner in lead climbing. He is a two-time Olympic bronze medalist in the combined event.
Stefano Ghisolfi is an Italian professional rock climber, who specializes in competition climbing, sport climbing, and bouldering. In competition climbing, he completes in competition lead climbing, competition bouldering, and competition speed climbing, with lead being his strongest discipline. As a sport climber, he has redpointed sport climbing routes of grade 9b+ (5.15c), onsighted routes of 8c (5.14b), and solved boulder problems at grade 8B+ (V14). In December 2018, after climbing Perfecto Mundo, he became the fourth climber in history to redpoint a 9b+ (5.15c) route.
Jan Hojer is a German professional rock climber specializing in sport climbing, bouldering, and competition climbing. He is known for winning one World Cup and two European Championships in competition bouldering. In May 2010, he climbed Action Directe, one of the most difficult sport climbing routes in the world. From 2013 to 2015, he sent several 8C (V15) boulder problems.
Seo Chae-hyun, also known as Chaehyun Seo, is a South Korean professional rock climber who specializes in competition climbing. She won the overall 2019 World Cup title in competition lead climbing in her senior debut season. In 2021 she won the IFSC World Championship in lead climbing. Seo is a two-time Olympian, having represented South Korea at the 2020 and 2024 Summer Olympics.
Laura Rogora is an Italian rock climber who specializes in sport climbing and in competition climbing. In 2021, she became the third-ever female climber in history to redpoint a 9b (5.15b)-graded sport climbing route, with her ascent of Erebor in Italy.
Natalia Grossman is an American professional rock climber who specializes in competition climbing. She represents the United States at IFSC Climbing World Cup in competition bouldering and competition lead climbing. She has had 22 podium finishes at World Cup events, including 11 gold medals, and is the only climber to have won four consecutive overall titles in bouldering.
Sean Bailey is an American professional rock climber, who specializes in competition climbing, sport climbing, and bouldering. He has represented the United States in the IFSC Climbing World Cup in lead climbing, and has two podium finishes in bouldering at individual legs of the World Cup, including a win at the Salt Lake City leg of the 2021 World Cup.1 and three in lead climbing, including two gold medals, at the Villars leg, and Chamonix leg, in July 2021.
Colin Duffy is an American professional rock climber who specializes in competition climbing. At age 17, he became the youngest climber to qualify to compete at the 2020 Summer Olympic Games in Tokyo.
Hamish McArthur is an English professional rock climber and competition climber, who specialises in competition bouldering and competition lead climbing events.
William (Will) Bosi is a British professional rock climber specializing in sport climbing, bouldering and competition climbing. Bosi is only the second British sport climber in history to redpoint a 9b (5.15b) graded sport climbing route, and by 2023, was one of only a small group of climbers in the world to have completed a V17 (9A) boulder.
Shawn Raboutou is an American rock climber. In 2022, he became the second person to climb the bouldering grade of V17 (9A), a feat which he repeated only months later.
Simon Lorenzi is a Belgian professional rock climber specializing in sport climbing, bouldering and competition climbing. Lorenzi is one of the very few climbers to have repeated a V17 (9A) bouldering route, and the third climber to solve Burden of Dreams, the first-ever V17 (9A) graded boulder route. Lorenzi also made the first ascent of Soudain Seul, a V16/V17 boulder.
