Anna Hall established herself as a formidable multi-event athlete early in her career, earning three New Balance Nationals pentathlon titles between 2017 and 2019, alongside the high jump title in 2018. She began setting national high school records in pentathlon and heptathlon in 2018, the same year she made her international debut, finishing ninth at the World Under-20 Championships. Hall continued her ascent, securing the Pan American U20 Championships heptathlon title in 2019 and becoming a back-to-back U20 national champion in heptathlon. Her collegiate career commenced at the University of Georgia (2019-2021), where she quickly earned All-America honors in high jump and pentathlon for the 2020 indoor season.
Following knee surgery in January 2024, Hall mounted another impressive comeback, securing her spot at the 2024 Paris Olympics by winning the heptathlon at the U.S. Olympic trials, where she ultimately finished fifth. In 2025, she achieved a new personal best of 7032 points, winning the Hypo-Meeting in Götzis and tying for second on the all-time list. Hall continued her championship streak, winning her fourth consecutive heptathlon title at the 2025 USA Outdoor Track and Field Championships.
She reached the pinnacle of her career by becoming the World Champion in heptathlon at the 2025 World Athletics Championships in Tokyo with 6888 points, simultaneously winning the World Athletics Combined Events Tour for the year.