Bisher bestätigte Veranstaltungen der UTMB World Series 2023:
- Tarawera Ultramarathon™ by UTMB® (New Zealand), 11-12 February
- Amazean Jungle Thailand by UTMB® (Thailand), 17-19 February
- Istria 100™ by UTMB® (Croatia), 13-16 April
- Desert RATS™ Trail Running Festival™ by UTMB® (USA), 14-16 April
- Ultra-Trail Ninghai by UTMB ® (China), 15-16 April
- UTMB® World Series American Major; The Canyons Endurance Runs™ by UTMB® (USA), 28-29 April
- Transvulcania by UTMB® (Spain), 4-6 May
- Ultra-Trail Australia™ by UTMB® (Australia), 11-14 May
- Ultra-Trail Snowdonia by UTMB® (Wales), 12-14 May
- Valhöll Argentina by UTMB® (Argentina), 12-14 May
- Trail Alsace Grand Est by UTMB® (France), 18-21 May
- Mountain Ultra-Trail™ by UTMB® (South Africa), 26-28 May
- Trail du Saint-Jacques by UTMB® (France), 3-4 June
- mozart 100™ by UTMB® (Austria), 17-18 June
- La Sportiva® Lavaredo Ultra-Trail® by UTMB® (Italy), 22-25 June
- Trail 100 Andorra™ by UTMB® (Andorra), 24-25 June
- Western States® 100-Mile Endurance Run (USA), 24-25 June
- UTMB® World Series European Major; Val d’Aran by UTMB® (Spain), 6-9 July
- Restonica Trail by UTMB® (France), 6-8 July
- Trail Verbier Saint-Bernard by UTMB® (Switzerland), 7-9 July
- Eiger Ultra Trail™ by UTMB® (Switzerland), 12-16 July
- Speedgoat™ Mountain Races by UTMB ® (USA), 21-22 July
- KAT100™ by UTMB® (Austria), 3-5 August
- UTMB® World Series Finals; UTMB® Mont-Blanc (France, Italy, Switzerland), 28 August – 3 September
- Julian Alps Trail Run by UTMB® (Slovenia), 8-10 September
- Wildstrubel by UTMB® (Switzerland), 14-17 September
- Paraty Brazil by UTMB® (Brazil), 22-24 September
- Grindstone Trail Running Festival™ by UTMB® (USA) 22-24 September
- Nice Côte d’Azur by UTMB® (France), 28 September – 1 October
- TransJeju by UTMB® (South Korea), 7-8 October
- Puerto Vallarta México by UTMB® (Mexico), 3-4 November
- Kullamannen™ by UTMB® (Sweden), 3-4 November
- TransLantau™ by UTMB® (Hong Kong), 10-12 November
- UTMB® World Series Asian-Pacific Major; Doi Inthanon Thailand by UTMB® (Thailand), 8-10 December
- Ultra-Trail Kosciuszko™ by UTMB® (Australia), 7-9 December