Ultra-Endurance Athlete Heather Jackson Redefines Preparation for Unbound XL Amidst Diverse Challenges

In a departure from the conventional training regimens of reigning champions, Heather Jackson, a prominent ultra-endurance athlete, has adopted an unconventional strategy leading up to her title defense at Unbound XL. Rather than dedicating the weeks prior to intense cycling-specific preparations, Jackson immersed herself in the demanding 250-mile Cocodona ultramarathon across the Arizona desert. This bold approach reflects her evolving philosophy toward endurance sports, where mental and physical resilience is honed through a diverse range of athletic challenges, setting the stage for a unique competitive season that also includes the formidable Tour Divide.

While most elite athletes defending a title like Unbound Gravel meticulously fine-tune their equipment, optimize their physical condition, and prioritize recovery in the preceding month, Jackson chose a different path. She recently conquered the Cocodona 250, an arduous ultramarathon that spans the Arizona desert. During this grueling event, she experienced hallucinations, managed with only two 15-minute naps, and emerged physically unscathed but mentally taxed after nearly 70 hours without sleep. However, for Jackson, this intense ultramarathon was not a diversion but an integral part of her broader athletic season.

Having transitioned from a professional triathlon career, Jackson initially found her niche in gravel racing, drawn by its sense of exploration and adventure. Over time, her ambitions expanded to encompass the most extreme facets of endurance sport, including ultrarunning, unsupported bikepacking, and multi-day races where the ability to withstand sleep deprivation is as crucial as physical prowess. Her current summer schedule positions Unbound XL strategically between the Cocodona ultramarathon and the Tour Divide, a challenging bikepacking race. Jackson candidly admits uncertainty regarding her capacity to excel in both ultra-running and ultra-cycling concurrently.

Jackson's unique training philosophy marks a significant shift from the highly structured, data-driven specificity that characterized her earlier career. Preparing for both Cocodona and the Tour Divide simultaneously compelled her to re-evaluate the essence of ultra-endurance fitness. Instead of logging extensive running mileage for the 250-mile race, she dedicated her spring to balancing long running sessions with substantial blocks of endurance cycling, strength training, and weighted hill repeats. Her focus was not merely on maximizing distance but on cultivating overall durability and resilience. This realization, that success in the longest events transcends purely aerobic fitness, has propelled Jackson further into the realm of ultra-endurance racing.

This year, Jackson’s calendar is built around events that deeply resonate with her evolving athletic interests, rather than adhering to a conventional gravel racing season. Cocodona and the Tour Divide bikepacking race were high on her list, demonstrating her commitment to pushing boundaries beyond traditional disciplines. Consequently, Jackson arrives at Unbound XL in an unusual position: a defending champion who is simultaneously recovering from one ultra-endurance challenge and preparing for another. Her mindset reflects this duality, acknowledging that a strong performance would be exceptional, but regardless of the outcome, the experience will be a valuable endeavor.