David “Jacko” Jackson, a former professional rugby player from north Wales, is approaching the conclusion of an ambitious effort to run 100 ultramarathons in 100 consecutive days. Each ultramarathon covers approximately 50 kilometers (around 30 miles). The challenge, which began in May from his home near Caernarfon Castle, is expected to end there on Saturday.
Jackson, 44, who retired from rugby after sustaining a traumatic brain injury in 2013, embarked on this feat not only to raise funds but also to increase awareness about brain injuries. He is supporting charities Headway and Head for Change through the run. Over the course of his journey through England and Scotland, more than 700 people, ranging in age from eight to their eighties, joined him for portions of the runs.
Despite the physical demands, Jackson emphasizes a measured approach. He likens the process to the story of the hare and the tortoise, focusing on perseverance rather than speed. “It’s not about running fast,” he said, “Slow and steady – and do it again tomorrow.”
Jackson’s rugby career ended following a seizure on the pitch and lingering symptoms including fatigue and cognitive difficulties. After his recovery, he coached strength and conditioning and developed an interest in breathing techniques and running, inspired in part by the Japanese “marathon monks” who run extensive distances in pursuit of spiritual enlightenment.
Initially, Jackson aimed to complete two marathons per day but had to adjust after suffering a leg injury in the Lake District. He described the moment as a low point, expressing frustration and pain. With encouragement from his wife Catherine—who also provides his physiotherapy, nutrition, and logistical support—he shifted the goal to one ultramarathon daily and continued, guided by the mindset of taking it day by day.
The couple travels together in their camper van, which serves as their base for preparing meals and managing hydration, especially crucial during recent heatwaves. Inspirational messages and reminders about mindset are displayed inside the vehicle to support Jackson’s focus.
The journey has fostered connections beyond running, with many participants sharing personal stories, struggles, and triumphs along the way. Catherine noted that Jackson’s openness about his own challenges encouraged others to open up, creating a community of shared experiences. The pair have mostly camped in their van but have also received hospitality from strangers offering accommodation, meals, and laundry assistance.
While away from home, Jackson said the experience felt like unplugging from society, an unexpected but welcome benefit amid the physical and emotional demands. He has not shaved during the challenge, growing a beard that has drawn comparisons to the fictional character Forrest Gump, with some passing onlookers shouting, “Run Forrest, run.”
As Jackson nears the project’s finish, he remains focused on completing the run and hopes the effort will leave a positive impact both for himself and those affected by brain injuries.