Thunder Challenge!
Tough is only the beginning.
The first obstacle course created, lead and produced by US Special Forces soldiers.
Thunder Challenge tests your physical and mental strength against U.S. Special Forces and Navy SEAL training where tough is only the beginning
Thunder Challenge Rockies
Castle Rock, Colorado
August 4-5
Register HERE. Join MBS’ team.
Ask Pat for exclusive discount code: patrick@mbscrossfit.com.



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