18
The Great Run Company
2025 Environmental Report
Participant Travel
Key Findings: The 2025 data reveals a clear ‘modal divide’, where the majority of participants drive, but the minority of flyers generate a disproportionate environmental impact. The ‘Car Default’: Private cars remain the primary mode of travel, accounting for 53% of all journeys and 64.4% of total emissions. For over half of our participants, driving is still perceived as the most convenient or only viable option The Aviation Multiplier: Flights represented only 1.6% of journeys but were responsible for 25% of total emissions. This means fewer than 2 in 100 runners generate a quarter of the entire travel footprint. Rail Efficiency: Rail travel shows strong uptake, covering 29.4% of journeys and nearly 30% of the total distance, yet only contributing 8.5% of emissions.
Emissions (tCO2e) per travel mode per event
Travel Mode
BBr
BNew
GBiR
GBrR
GMR
GNS
BLon
GN10k
BMan
GNR
13V
GScR
GSoR
0.188 0.000 2.606 20.996 20.555 0.978 0.000 0.994 0.000 339.209 0.263 47.673 5.959 2.890 0.000 0.000 0.000 1.057 0.030 0.000 0.000 0.000 192.249 30.416 321.754 38.746 3.481 3.243 85.754 163.789 178.130 178.169 1.093 90.922 0.535 1124.101 120.050 213.228 476.040
Flight - Domestic
Flight - Internat.
Car
0.000 0.007 0.944 0.211
0.881 0.000 0.656 0.093 0.017 3.722
0.000 0.206 0.022 5.045
0.066 1.085 0.117 20.021 0.000 0.000 0.000 0.000
Taxi
0.029 0.806 6.654 2.855 7.911
0.174 0.461 0.351 0.010 8.929
Bus
0.000 0.000 0.894 1.953
0.000 0.149 0.000 0.019 0.006 33.413 0.112
1.743
Coach
0.426 0.163 8.329 14.548 23.199 3.959 0.600 3.463 0.252 174.410 5.900
74.496
National Rail
0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 9.491 0.000 0.000 0.850 0.012 5.599
0.000 0.000 0.000 2.766 0.000 0.000 0.000 0.000
International Rail
Light Rail & Tram
LDN Underground 0.000 0.000 0.000 0.000 0.000 0.000 0.489 0.000 0.000 0.000
0.000 0.000 0.000 0.000 1.000 0.000 0.000 0.000 0.000 0.000
Motorbike
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