Alex started climbing in 2002 at age thirteen with her mother. In 2006, she participated for the first time in the U.S. Bouldering Championships, and won the title. She later won in 2007, 2008, 2010, 2011, 2012, and 2013. In 2008, 2009 and 2010 she competed in the World Cup bouldering climbing but only at the stage of Vail finishing sixth respectively, before and fourth. In 2011, she took part in all the steps going up to the podium five times, with three second places and two third places. Since then she has been a fixture on the IFSC Bouldering World Cup circuit where she is constantly a finalist.
She has ascended over two dozen boulders graded V12 (8A+) between the United States and Europe. On July 2, 2014, Puccio ascended Top Notch in Rocky Mountain National Park. This was her first V13(8B) graded boulder. A month later, she ascended Jade becoming the fourth woman to climb V14.
Alex placed second in the Boulder World Championship in Munich, Germany on 23 August 2014.
On June 5, 2015 Alex sustained a season ending knee injury while warming up her dynos during the IFSC World Cup competition in Vail, CO. She required surgery to repair the torn ACL, MCL, and meniscus ligaments in her left knee which could have resulted in months of inactivity during the recovery. Despite a six-month inactivity prediction she was back climbing V13 (8B) by October 2015 with an ascent of Free Range in Boulder Canyon, CO.
In February 2016, Alex won the Hueco Tanks 'Rock Rodeo' amid world class competitors proving that she was still in top form. Puccio also had the most productive week-long bouldering trip by any female in history by completing three V13 (8B) boulders among many other double-digit (V-scale) boulders.
On June 19, 2016, Alex underwent a spinal fusion surgery after doctors discovered a herniated disk between the C5 and C6 vertebrae. She first noticed the serious nature of the injury during the finals of the 2016 bouldering World Cup in Vail, CO when she felt shooting pain and weakness in her arms. Despite the pain she still climbed in the finals.
On December 19, 2016 Alex climbed the iconic razor blade climb Terre De Sienne V13 (8B) at Hueco Tanks. This achievement marked her 15th climb of that difficulty. The ascent is a testament to how resilient and determined Alex is by climbing at a world class level so soon after a serious injury.
Alex Puccio is the most accomplished American female bouldering competitor. She has won the ABS National Championship ten times and is the top American female bouldering competitor at the IFSC world competitions. She has earned numerous medals in the bouldering World Cup events including a gold medal at the 2009 World Cup held in Vail, CO. In 2014, she earned a gold medal at the Arco Rockmaster event and a silver medal in the World Championships for bouldering.8B+(V14)The Wheel of Chaos - Rocky Mountain National Park (USA) - 20 September 2014 - First female ascentJade - Rocky Mountain National Park (USA) - 3 August 2014 - First female ascent8B(V13)Dead Meadow - Wild Basin (USA) - 2 June 2017 The Tea Cup - Leavenworth (USA) - 16 April 2017 Luther - Hueco (USA) - 22 February 2017 - This is the low start to Chablanke (V11)Terre De Sienne - Hueco (USA) - 19 December 2016 Nagual - Hueco (USA) - 21 February 2016 - FFASlashface - Hueco (USA) - 20 February 2016 - FFA of this historic Fred Nicole climb that was once considered the most difficult boulder problem in the world and originally graded V14(8B+).Crown of Aragorn - Hueco (USA) - 18 February 2016Dark Waters - Rocky Mountain National Park (USA) - 9 November 2015Free Range (aka cage free assis) - Boulder Canyon (USA) - 21 October 2015Don't get too greedy - Rocky Mountain National Park (USA) - 14 October 2015Irreversible - Rocky Mountain National Park (USA) - 26 September 2015Direction - Bishop (USA) - 4 March 2015The Swarm - Bishop (USA) - 23 November 2014 - Some say it may be 8B+(V14)Black Lung - Joe's Valley (USA) - 25 November 2014 - First female ascentFreaks of the Industry - Rocky Mountain National Park (USA) - 7 September 2014The Automator - Rocky Mountain National Park (USA) - 18 August 2014Nuthin But Sunshine - Rocky Mountain National Park (USA) - 7 July 2014Top Notch - Rocky Mountain National Park (USA) - 2 July 2014 - First female ascent