The pair were joined by other people who wanted to partake in the walk, and the 57 miles were broken up into three different days, with physical trainers assisting all along the way!
Hunter spoke about his commitment to helping his brother, saying:
"I wanted to show people the struggles that Braden has to go through daily. I wanted to go out and show people we can make the world a better place for people with cerebral palsy.
If it weren't for everyone cheering and walking with us, I wouldn't have been able to do it. I collapsed at the end of the second day because I was so tired. My legs were so sore but my friends picked me up and I made it through the third day."
The brunette shared a sweet photo with her former flame and penned a heartbreaking caption in his memory.
The late sports star's longtime love reflected on their time together, writing:
"My deepest love goes out to those who saw jose as more than an athlete, but as a passionate, raw human being. The heart break is unbearable. There was so much more to him than anyone could even begin to understand. I'm fortunate enough to have loved and be loved by jose, and his family, for over 3 crazy beautiful years."
Miz Mendoza admitted she will always love the 24-year-old, and told her followers to never take moments with their loved ones for granted, adding: