Runners and walkers participate in the 2016 Bolder Boulder 10K. More than 50,000 participate each year.


Runners, walkers and wheelchair athletes of all ages participated in the 2016 Bolder Boulder 10K. More than 50,000 participants show up each year, including many internationally respected competitors. About 70,000 spectators also show up to encourage amateur and professional participants. For more info:


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Photo credit: © Ron's Boulder and Colorado Collection / Alamy / Afripics
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