Competitors in this year’s Lowe Alpine Mountain Marathon will get a reminder of their impact on the environment.

Organisers say entrants will be quizzed on their journey to and from the event and given the chance to make a voluntary tax to offset their carbon dioxide generation. The money will be put to use elsewhere in the globe in an effort to neutralise the event’s effect on climate change.

Any contribution to the voluntary tax will be matched pound for pound by the marathon organisers.

The Lowe Alpine Mountain Marathon (LAMM) website says: “We are introducing an idea that we think is a first at sporting events.

“We would like to stimulate debate by making our competitors aware of the environmental impact caused by their journey to the LAMM.

“We will use the information you provide about your journeys to the LAMM to calculate the approximate amount of carbon dioxide your journey to and from the LAMM will generate.”

The amount raised through the event’s carbon tax will be displayed on the LAMM website. Project to benefit from the money raised will be decided after the event is over.

The precise location of the event is secret until a short time before the June marathon, but organisers have said it will be somewhere within a few hours' travelling time of Glasgow and Aberdeen.