The Barbed Wire Crawl obstacle is the slowest, and its difficult depends on a variety of causes.
They can be the slope, the barbed wire height and if the terrain is mud or rocky hard.
Some of you asked me about the barbed wire crawl length, well, there is no answer because the length vary from race to race.
Barbed wire height: if it is high, you can even try a low bear position. If it is a medium or low height, you'll have two option.
I suggest the rolling but look at where you puts your feet when there is a lot of people.
Slope: it doesn't really matter, use your preferred technique.
Terrain: mud is better, you can easily roll and probably there won't be too many cutting rocks.On the contrary, if it is hard, look where you put your extremities. Although it will be hard to avoid cuts.
Mandatory to complete. No burpee option for failure.