Charity Partner

National Brain Tumor Society

National Brain Tumor Society unrelentingly invests in, mobilizes, and unites our community to discover a cure, deliver effective treatments, and advocate for patients and caregivers.

Gray Nation Endurance is the National Brain Tumor Society’s official endurance program where individuals from around the country dedicate countless hours of training and fundraising to support the NBTS mission while putting meaning behind their miles for themselves, their loved ones, and for progress toward a cure for all brain tumors. Together, our endurance athletes are fueling a new era of progress by joining our official charity teams, like our 2022 Denver Colfax Marathon team.

Please contact Nikki Margeson at for more information about our Gray Nation Endurance program or how
to get started.