🇺🇸 Hannah Grisham

Hannah Grisham is a professional endurance racing driver, FIA Silver graded, racing for Heart of Racing Team. She competes across multiple national American series, primarily in GT4-based single-class and multiclass championships in shared-car racing, though her record spans a decade of varied machinery from Mazda Miata through to contemporary GT machinery.[1]

Her racing began in NASA in 2016, where she spent six seasons and took 12 wins and 38 podiums across 65 starts in Mazda Miata, establishing herself as a consistent front-runner in that series. She moved into graded sportscar racing in 2023, joining GT4 America where she has taken 6 podiums from 28 starts for Heart of Racing Team in both the Am and Silver GT4 classes. She raced the 24H Series once in 2025, finishing on the podium in the GT3 class, and made a brief entry to Lamborghini Super Trofeo in 2024 with a win among two podiums. Her 2026 season spans IMSA Pilot Challenge in the GS class and World Racing League, where she has won three of four races completed so far and claimed all four available podiums.[2]

In the wider endurance field, Grisham sits in the mid-order of a grid that mixes amateurs with established professionals. She has beaten the Platinum-graded Earl Bamber, a 2019 IMSA WeatherTech GTLM champion, once in their meetings. More regularly, she runs ahead of the developing Steven Champlin across their NASA seasons, while remaining typically behind the competitive amateur Ryan Pond in shared competition. Her current World Racing League campaign shows consistent strength; she has claimed poles in three consecutive IMSA Pilot Challenge rounds.