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22 - 25 January 2026
19 - 22 March 2026
19 - 21 March 2026
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14 - 17 May 2026
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23rd May 2026
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30 - 31 October 2026
07 - 09 November 2025
31 October - 02 November 2025
Oceania
14 - 15 February 2026
26 - 28 November 2026
North America
05 - 07 March 2026
23 - 25 April 2026
27 - 28 June 2026
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14 - 16 August 2026
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Asia
06 - 08 March 2026
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30 April - 03 May 2026
18 - 21 June 2026
10 - 12 December 2026
29 November - 07 December 2025
14 - 16 November 2025
08 - 09 November 2025
17 - 19 October 2025
16 - 18 May 2025
11 - 20 April 2025
01 - 02 March 2025
South America
18 - 22 March 2026
26 - 28 June 2026
31 July - 02 August 2026
18 - 22 November 2026
Africa
29 - 31 May 2026
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SEAN O BRIEN TRAIL RUNS 2018 - 100 KM
City / Country
United States of America
Date
Race Category
Distance
Elevation Gain
