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Golden, United States
In the mountains, just 45 minutes west of downtown Denver, CO, this race is 95% singletrack trails in a single loop course. It is between 7,500 and 9,500 feet elevation. The Dirty 30 is one of the largest 50K/ ultra races in the US. The fun, supportive, and inspiring community makes this a favorite race for many, but the challenging and beautif
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