Doc interviews David Parrish of Off the Trail Recreation (OTTR) about his inspiration for the company's name and logo, his experiences with the Grand Canyon Rim-to-Rim-to-Rim challenge, and his preparations for future attempts. They discuss the challenges and memorable moments of his hikes, including the importance of preparation and the benefits of switching electrolytes. David also shares stories from his adventures, such as an entertaining tale from his childhood involving a tick and his father's misguided attempt to remove it. Additionally, they talk about David's line of sun shirts and the intricacies of producing them in the USA.