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Cantrell's passion for this unique race format originated in his teenage years. Designed to be grassroots and accessible, the Backyard Ultra can be organized in a relatively small area—making it easier to host and participate in. Since its inception, the rules for the race have remained unchanged, a testament to the efficacy of Cantrell's vision.
Participants often come seeking personal goals, with many aiming to run further than ever before. The laid-back atmosphere allows runners to engage socially amidst the physical challenges they face, leading to a supportive environment where conversations are nurtured during each lap before the intensity of the race begins to take its toll.