On July 10th, 2019, Jim Hasse, my dad and climbing partner, died in a mountaineering accident on Maroon Peak in the Colorado Rockies only four days after he walked my sister down the aisle. She had just married my friend and brother-in-law Matt, who along with friends Paul and Rob, were on the mountain with him when he died. What follows is their account. He had a tremendous impact in the lives of countless people, as a mentor, a leader, a coach, and a friend. He will be sorely missed.