The 100 Toughest Races in the World
- 1. Tour de France
- 2. Tour D'Afrique
- 3. Peak Death Race
- 4. Odyssey Endorphin Fix
- 5. Race Across the West
- 6. Texas Water Safari
- 7. Arrowhead (Footrace)
- 8. Cape Epic
- 9. Yukon River Quest
- 10. Great Divide Race
- 11. Arrowhead (ski)
- 12. Barkley Marathons
- 13. Atacama Crossing
- 14. Adirondack 540
- 15. Jungle Marathon
- 16. Tour of California
- 17. Hurt 100
- 18. Furnace creek 508
- 19. Gobi March
- 20. Hard Rock 100
- 21. St. Croix Coral Reef Swim Race
- 22. BC Bike Race
- 23. Badwater 135
- 24. Marathon De Sable
- 25. Planet Adventure
- 26. Wasatch Front 100
- 27. 24 Hours of Lappe
- 28. Trans Rockies
- 29. Mount Rushmore Trail 100
- 30. Bear 100
- 31. Bighorn 100
- 32. Primal Quest
- 33. Kayak the Nile
- 34. Avalon 50 Miles
- 35. Leadville Trail 100 (Run)
- 36. Manhattan Marathon Island Swim
- 37. La Ruta Maya Belize River Challenge
- 38. McNaughton Park 150 Mile Trail Run
- 39. AuSable River Canoe Marathon
- 40. Rock and Ice Ultra
- 41. Grand Tetons 100
- 42. Plain 100
- 43. Massanutten Mounta Trails 100
- 44. Canadian Death Race
- 45. Peak Races 200 Mile Funeral Run
- 46. Kettle Moraine 100
- 47. Zane Grey 50
- 48. Coastal Crawl 10K Swim
- 49. Arctic Circle Race
- 50. Ironman Lake Placid
- 51. Devizes to Westminster
- 52. IronMan Lanzarotes (Spain)
- 53. IronMan Canada
- 54. IronMan Hawaii World Championship
- 55. Silver State 50
- 56. Breckenridge 100
- 57. Swim Miami
- 58. Dusi Canoe Marathon
- 59. Isuzu Berg River
- 60. Mt Hood PCT 50
- 61. White River 50
- 62. Quicksilver 50
- 63. Leona Divide 50
- 64. Bridge to Bridge Swim
- 65. DaIsland Canoe Marathon
- 66. McKenzie River 50
- 67. Western States 100
- 68. WildFlower Long Course Triathlon
- 69. Avon Descent
- 70. North Routt Coureur des Bois
- 71. Alcatraz Challenge
- 72. La Traversee du Lac Saint-Jean
- 73. Oosik Classic Ski Race
- 74. Grand Defi des Glaces
- 75. The Big Swim
- 76. Horsetooth Open Water 10K
- 77. Peak Ultra Challenge
- 78. Iditarod
- 79. Gold Rush Adventure Challenge
- 80. MegaDose 4-Day Adventure
- 81. Untamed VA
- 82. Raid the North Extreme
- 83. Polar Challenge
- 84. North Face Tour du Mont Blanc
- 85. Overmountain Extreme
- 86. Herc Open Hiking Race
- 87. The BEAR (Beach Extreme Adventure Race)
- 88. Soggy Bottom 100
- 89. Cascade Cream Puff
- 90. Leadville Trail 100 (Bike)
- 91. Crocodile Trophy
- 92. La Ruta de Los Conquistadores
- 93. MT Hood Cycling Classic
- 94. RAAM
- 95. Trans UK
- 96. Equinox Ski Challenge
- 97. Vasaloppet
- 98. Pittsfield Snowshoe Marathon
- 99. Xtrail Asics trail race series
- 100. The Great amazon River Raft Race
