Great work!! I’m glad you’re stoked with the outcome of your race 
It’s great that you have found a diet that works for you, and supports your goals.
The optimal diet for each of us depends on our unique goals, and a host of factors that provide the context for our lives. The science suggests that for the majority of endurance athletes, with performance as the primary goal, a LCHF is not optimal.
But that is not to say, it’s not optimal for anyone and it sounds like it works great for you @Chris1982! 
I’d like to ensure that this thread remains constructive so I’m linking to our Community Guidelines. I encourage everyone to refrain from sweeping generalisations based on our unique experience.