In May 2015, McCastle successfully climbed 29,029 feet (the equivalent of climbing to the top of Mount Everest) by scaling a 20-foot rope 1,450 times in under 27 hours. McCastle's goal was to raise $20,000 for the Michael J. Fox Foundation for Parkinson's Research. McCastle had lost his father to Parkinson's a few months earlier. Prior to the rope climb, McCastle also completed a 50k run for cancer research.