Juni Arnekleiv is a Norwegian biathlete known for her rapid ascent in the sport, securing multiple World Cup podiums and relay victories. After securing a bronze medal in the 4×6 km relay at the Youth World Championships in Otepää in 2018, Juni Arnekleiv continued her rapid ascent in biathlon, earning a second bronze medal in the 4×6 km relay at the Junior World Championships in Lenzerheide in 2020. She further demonstrated her potential with an individual bronze in Sprint at the Junior World Championships in Obertilliach in 2021. Arnekleiv made her World Cup debut in January 2022, effectively laying a strong foundation for her transition to senior-level competitions through consistent performance.
In the subsequent 2024-25 season, after facing initial challenges in World Cup events, she strategically competed in the IBU Cup to regain form before rejoining the Norwegian A team in preparation for the upcoming 2025-26 season. Arnekleiv is supported by leading equipment sponsors including Salomon for skis and boots, Leki for ski poles, Anschütz for rifles, Polar for ammunition, and Craft for race suits, underscoring her marketability and professional standing in the sport.