Nelson Dellis is a memory athlete, Grandmaster of Memory, mountaineer, published author, public speaker, and consultant. He is a four-time USA Memory Champion, tying the record for most wins of the national memory champion title. He is also one of the co-founders of Memory League. Nelson also runs Climb 4 Memory, a nonprofit which "aims to raise funds and awareness for Alzheimer's disease research through mountain climbs around the world."

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