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National Brain Tumor Society | Brain Tumor Investment Fund

Big Sur International Marathon & 11 Miler

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Run the Ragged Edge of the Western World

Put meaning behind your miles with Gray Nation Endurance at the Big Sur International Marathon & 11-Miler. Widely regarded as one of the most breathtaking races in the world, Big Sur takes you on a challenging and unforgettable journey along California’s scenic Highway 1. You’ll wind past towering redwoods, roll over rugged coastal hills, and cross the iconic Bixby Bridge to the sound of live piano music echoing through the cliffs. With ocean waves crashing beside you, cattle grazing in the fields, and panoramic views at every turn, this course is as inspiring as it is demanding and meaningful. Run the ragged edge of the Western World with Gray Nation Endurance, turning every mile into progress to conquer and brain tumors – once and for all.

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A Race to Remember

Gray Nation Endurance®

Put meaning behind your miles.

Gray Nation Endurance®️ is the official endurance program of the National Brain Tumor Society. Join NBTS and individuals around the country by applying for a charity team or by selecting a race or endurance activity of your choice. Whether you run, ride, swim, hike, or paddle for NBTS, you can celebrate a survivor, pay tribute to a loved one, or make an overall difference with your miles.

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Your year-end gift has an immediate impact, supporting patients, driving advocacy, and funding groundbreaking research. Right now, thanks to a challenge from the NBTS Board, your gift is worth even more — help us raise $300,000 during the last 10 days of 2025 to unlock an additional $150,000.

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