The 2014 UVU North Pole Marathon was recently awarded 'Carbon Free' status from CarbonFund.org.
The race invested in forestry projects in the Brazilian Amazon in order to neutralise the impact of CO2 emissions from holding the event.
The process involved is outlined below:
(a) The CO2 impact of the 2½ hour flights to the North Pole camp - and related helicopter flights in the polar region - was scientifically calculated on the basis of the type of aircraft used, fuel burn rate, fuel type and flight duration.
(b) The impact of attendees' CO2 emissions via their international flights to the departure point (Svalbard) was estimated.
(c) The CO2 impact of other fuel used at the Pole, e.g. heating of accommodation tents, was worked out.
The overall calculated impact is then offset by an equal investment in reforestation projects in the Brazilian Amazon.
See this story from the Carbonfund.org website about the 2013 event, which was also awarded Carbon Free status:
The biggest field in the sixteen-year history of the race took part in 2018 FWD North Pole Marathon, the world's coolest marathon.
The race started at 2230 hrs (Norwegian time) on April 8th under sunny skies and a temperature of -31 degs Celsius.
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The annual North Pole Marathon is scheduled to occur on April 9th when a record 56 competitors from 21 countries will take part in the 2016 race.
Czech runner Petr Vabrousek kept his composure to clinch one of the world’s most gruelling sporting challenges, the North Pole Marathon.
Forty-five competitors from twenty-two countries and five continents are scheduled to take part in the UVU North Pole Marathon on 9th April 2015.