The Haslingden High School and Sixth Form Year 13 student showed true resilience when the first puncture, on a rear tyre, happened as she was tackling Inglebrough, her first peak.
The sport involves riding and carrying bikes around moorland terrain and, despite the puncture, she still made the top of Ingleborough in 1 hour 12 mins.
She then had to get her damaged bike to her pit crew so she could switch it for her spare, so Elsie rode it down the mountain on the rim and met up with her pit crew who swapped it for her spare bike.
Next up was Whernside, which gets steeper and steeper towards the top.
Elsie, 17, said: “At the top I wanted to cry, but I had done the first hill and I was halfway through the course.
“Then, at the top, I saw my Geography teacher Mr Raho, he was there supporting everyone, and he cheered me on so I shouted ‘Thanks sir’.
“I am best at descents, they are fun, I have an innate thing about going fast downhill, but then I crashed.
“I scorpioned, where my feet went over my head, and I have got some good bruises; I just went too quick.”
Ribblehead Viaduct was the next landmark, but by then her spare bike also had a flat tyre.
Luckily, she saw her mum Katie and her uncle Matthew Pixton had repaired the wheel on her main bike so she could swap.
Elsie said: “I had one more hill to do, Pen-y-ghent, but my bottle had fallen off my bike so I had nothing to drink. Fortunately, I caught up with my cousin who gave me some water and I got some from other people as I was cramping badly.
“I saw my dad who was also racing, it was his 30th start and his 25th finish, and my sister Lily was also helping out.
“Pen-y-ghent was really good and I finished in 4hrs 55mins, which knocked five minutes of the record and I got first place.”
When she attended the race last year, as a supporter, she discovered there was no trophy for the Junior Girls so she told the founders of Ride for Charlie charity – Charlie’s parents Nick and Sarah Craig.
They provided one for this year and Elsie will now be the first person to have their name engraved on it.
She said: “It was brilliant, it was so difficult and so much fun.”
With her dad she finished 12th in the parent and offspring and they were second as dad and daughter competitors.
More than 400 took part in the Three Peaks Cyclo-cross on September 28 with people of all abilities including some professional riders from abroad with around 375 finishing the course.
Elsie trains constantly and in the summer was riding bikes in the Pyrenees, France and Belgium. She has got national and European races coming up and is looking to go on to university to study Politics and International Relations.
She added: “If I didn’t ride bikes for two days in a row, I would go insane.”