Organisers of the Kathmandu Coast to Coast race have teamed up with a global environment group to ensure the iconic event leaves no trace upon the spectacular South Island countryside it traverses.
The annual multisport event, held next weekend, has become the first in the country to join forces with Leave No Trace New Zealand, part of an international movement to protect the outdoors by encouraging people not to leave any waste behind.
The effort was seen as a fitting one for the running, cycling and kayaking race, which crosses mountains, rivers and valleys in a dramatic 243km course stretching from Kumara beach on the West Coast to its end at New Brighton beach on the East Coast.
While the first race in 1983 involved only 79 athletes, the field had since exploded - and to date, more than 18,000 people have completed the course.
"We're renowned in New Zealand for our dramatic scenery, natural landscapes, flora and fauna and the unique race location is one of the most stunning courses in the world," Leave No Trace founder Chris North said.