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GMR Backyard Ultra
Saturday, May 23, 2026 · Golden, United States
Start location
Address to be supplied after registration
Golden, CO
About this race
The GMR Backyard Ultra format: run one lap every hour until only one runner remains. Each lap starts at the top of the hour. You can run fast and rest, or run slower to save energy. It's a fun event with friends, whether you do one loop or push to the ultra distance.