She is so serious about it that she taped a Comrades logo onto her refrigerator that reads: 'It takes all of you!'
Herron has good reason to be motivated. In fact, she has unfinished business at the Comrades. This year Herron had to withdraw from the race due to a torn hamstring and in 2014 she fell ill a day before the Comrades. Despite her illness she still tried to compete, but after 83 kilometres her body had had enough and she had to drop out.
'I can't wait to return to South Africa to run the Comrades. As far as I am concerned it is the largest and most prestigious ultramarathon in the world,' said Herron, who will compete in the colours of Nedbank Running Club.
She made it clear that she will certainly not be running merely to make up the numbers.
'I've learned I'm equally good at ascending and descending. I not only believe that I can win but also that I have the strength and speed to challenge the up and down course records at the Comrades. I have a unique ability to push myself to an extreme level of pain for a long time. I will focus on this and on getting the most out of myself.
'I've had a smooth recovery since my injury last spring and I am racing very well again. I have just won a major trail race over the past weekend (Ultra Race of Champions) and broke the course record by 27 minutes. That earned me the highest-rated trail performance in the world, showing that I can race well at any distance, in any terrain, or on any surface.
'My biggest upcoming race challenge is the IAU 100 km World Championship in November. I'll be defending my title and I also want to give the American record of 07:00 hours another shot.
'After that I will likely rest a bit before doing a mix of trail and road races of different distances and terrain. I enjoy racing, but we're also mindful to make sure I don't overdo it. I race best when I focus on being a 'complete athlete' – aerobically fit, strong, fast, and most importantly, healthy and well rested.
'I injured my hamstring because of heavy strength training (deadlifts). I will definitely not make the same mistake again, and will focus only on running.
'I appreciate the continued support from the Nedbank Running Club and everything they do to support athletes at all levels. No one can do it alone. It takes a team to be successful.'