British Endurance Runner on Setting a Guinness World Record in Sri Lanka

From Kilinochchi to Matara in just 110 hours, Cathryn Smart is taking on more than 500 kilometers of Sri Lankan roads in an extraordinary test of endurance.

With that she is carrying a story of personal recovery and a mission to help vulnerable children along the way.

When British endurance runner Cathryn Smart set out from Kilinochchi on September 15, she knew the next four and a half days would test her body, her determination and her ability to keep moving.

Her challenge, called “The Unbroken Island,” is a bid to become the fastest woman to cross Sri Lanka on foot, covering more than 500 kilometers from the north of the island to Matara in the south.

She is targeting a completion time of 110 hours.

The route takes her through Vavuniya, Anuradhapura, Dambulla, Kurunegala and Colombo before reaching Matara.

This route means, she is passing through some of Sri Lanka’s most varied landscapes and communities and diverse landscape.

To achieve her target, she needs to average more than 100 kilometers a day while allowing herself very little time to rest, but on day three she touched just around 60 KM, owing to a multiple obstacles she endured.

But the distance is only one part of Smart’s story.

From Sri Lanka to an impossible idea

Smart first came to Sri Lanka in 2024 during what she describes as one of the most difficult periods of her life.

The island’s people, hospitality and sense of peace left a lasting impression on her.

It is during this visit, an idea began to take shape:

“I want to run the length of Sri Lanka.”

There was, however, a major obstacle.

Smart says she was subsequently told that she needed full foot reconstruction surgery and was advised not to run because of the potential risks of fractures and long-term damage.

Rather than abandoning the idea, she eventually turned it into a challenge.

She does not describe herself as a professional runner. Instead, she sees the attempt as a personal test of what can be achieved when circumstances appear to impose limits.

500 kilometers — and the body begins to respond

The challenge has already brought its own difficulties.

After covering more than 100 kilometers a day, Smart has had to contend with blisters, exhaustion, hydration and nutrition challenges.

At one point, her support vehicle also broke down, adding another complication to an already demanding journey.

By the third day, reports put her at around 293 kilometers into the journey, after which she regained nutrition and hydration.

Her own description of the experience is simple:

“This is the hardest thing I am doing in my life.”

That sentence perhaps explains the scale of what she is attempting better than any number.

More than a record

For Smart, reaching Matara is not the only finish line.

The Unbroken Island is also raising funds and awareness for Their Future Today.

This is a charity working in Sri Lanka to prevent vulnerable children from being separated from their families and to support family reunification, fostering and related childcare reform.

A journey through Sri Lanka

There is also something distinctly Sri Lankan about the route.

The journey begins in the north, passes through the country’s historic and cultural heartland, moves through the busy roads around Colombo and eventually reaches the southern coast.

In just 110 hours, Smart is attempting to experience Sri Lanka not as a conventional traveller, but from the road — kilometer after kilometer, through heat, fatigue, changing terrain and the uncertainty that comes with an ultra-endurance challenge.

Whether she reaches Matara within her target time, the journey has already become a story about much more than distance.

And behind every kilometer is a message that Smart has chosen to call The Unbroken Island.