I have just started to put this list together. It will grow day by day:
Africa, Indian Ocean
- Marathon des Sables, 240km, MAROCCO, www.darbaroud.com/index.php?lang=en
- Le Parcours de la Diagonale des Fous (Grand Raid), 162km-9.643m asc., LAREUNION/F, www.grandraid-reunion.com
- Royal Raid, 80km-1.800m asc., MAURICE, www.royalraid.com
- Big Five Marathon, 42.195km, South Africa, www.big-five-marathon.com
Antarctica
- Antarctic Ice Marathon, 42 and 100km, ANTARCTICA, www.icemarathon.com
Asia
- Great Wall Marathon, 42km, CHINA, www.great-wall-marathon.com
- Lake Baikal Marathon, 42km, RUSSIA, www.baikal-marathon.de
- The High Ultra Trail, 222km-3.107m asc., www.thehigh.in/the_high/
Europe
- Bieler Lauftage, 100km, CH, www.100km.ch
- Celtman Xtreme Triathlon, 3.8-180-42km, SCO, www.cxtri.com – lottery 2015
ENGADINSwimRun, 6.5km – 46.5km Run – 1’450HM, SUI, www.engadinswimrun.ch – done 2014/lottery 2015- Inferno Triathlon, 3.1-97-30-25km, CH, www.inferno.ch
- Mountain Man, 80km-5.000m asc., CH, www.themountainman.ch
- Norseman Xtreme Triathlon, 3.8-180-42km, NOR, www.nxtri.com – lottery 2015
- Ö-till-Ö-SwimRun, 10km Swim – 65km Run, SWE, www.otillo.se – lottery 2015
Powerman Zofingen, 10-150-30km, CH, www.powerman.ch – done 2010- Rockman SwimRun, 6km Swim – 35km Run – 2’800HM, NOR, www.rockmanswimrun.com – lottery 2015
- Skala Opp, 8.2km-1848m asc., NOR, www.skaala.no
- Spartathlon, 244.6km-1.500m asc., GRE, www.spartathlon.gr
Swissman Xtreme Triathlon, 3.8-180-42km, SUI, www.suixtri.com – done 2014The Race, 240km run-kayak-bike-run-bike-run, IRE, www.therace.ie – done 2014/fixed 2015- Trofeo Kima Ultra Mountain, 50km-3.800m asc., I, www.kima.org
- Ultratrail du Montblanc, 163km-8.900m asc., CH/F/I, www.ultratrailmb.com
- UTOSwimRun, 4km Swim – 33km Run, SWE, www.utoswimrun.se – fixed for 2015
- Zugspitz Ultratrail, 100km/68.8km, GER, www.zugspitz-ultratrail.com
North America
- Badwater Ultra Marathon, 217.3km – 3.962m asc., USA-NEV/CAL, www.badwater.com
- Pikes Peak Marathon, 41.8km-2.380m asc., USA-COL, www.pikespeakmarathon.com
San Francisco Marathon, 42.195km, USA, www.thesfmarathon.com – done 2012- TransRockies Run, 185.1km-7.620m asc., USA-COL, www.transrockies.com/transrockiesrun/news
North Pole
North Pole Marathon, 42km, North Pole, www.npmarathon.com – done 2013
Oceania
- Bogong to Hotham, 64km-3.000m asc., AUSTRALIA, sites.google.com/site/bogong2hotham/
- Challenge Triathlon, Wanaka, 3.8-180-42km, NEW ZEALAND, www.challenge-family.com
- Kepler Challenge, 60km-1.350m asc., NEW ZEALAND, www.keplerchallenge.co.nz
South America
- 4Deserts, Atacama Crossing, 250km, CHILE, www.4deserts.com/atacamacrossing/
- Incatrail Marathon, 42km, PERU, www.andesadventures.com/run2asum.htm
Others, Worth to visit: