How hard are the 100 mile races?

Recent discussion on the ultralist and other places has talked about the relative difficulty of some of the most popular Ultramarathons in the US.

Larry Mangum has posted an interesting piece on his blog including a list of races. Here are the top 10.

135m 157% 133 BadWater Ultra Marathon
100m 155% 904 Hard Rock 100 Mile
100m 131% 58 HURT Trail 100 Mile
100m 117% 3279 Wasatch Front 100 Mile
100m 113% 45 Mount Rushmore Trail 100 Mile
100m 113% 115 Bear 100 Mile
100m 112% 90 Bighorn Mountain Trail Run
100m 111% 396 Massanutten Mountain Trails 100 Mile
100m 108% 14 Tahoe Rim Trail 100 miles
100m 108% 2156 Angeles Crest 100 Mile

Checkout Larry’s blog, Lewis Peak Journal

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