Laura Holzwasser of Boston lifts the letter “I” block during the “Building Blocks” Durham Warriors Survival Challenge in Durham on Friday. Holzwasser and her 11 teammates from the “Tinda” tribe competed against the men’s “Umpe” tribe at the fifth annual event that raises money for Bob Crowley’s Durham Warriors Project, which provides free stays for veterans at Crowley’s Durham retreat, Maine Forest Yurts. Contestants during the “Building Blocks” challenge had to run, lift, and pass blocks that spell “Survivor” without letting the blocks be touched by hand or the ground. 

Susie Smith competes during the Durham Warriors Survival Challenge in Durham on Friday. Smith, of Charles City, Iowa, lost to Bob Crowley during “Survivor: Gabon” in 2008. 

Dan Rodaire, right, of New York City celebrates with John Raymond of New Orleans after finishing the “It’s in the Bag” challenge during the Durham Warriors Survival Challenge in Durham on Friday. Rodaire and his 11 teammates from the “Umpe” tribe competed against the women’s “Tinda” tribe during the fifth annual event that raises money for Bob Crowley’s Durham Warriors Project, which provides free stays for veterans at Crowley’s Durham retreat, Maine Forest Yurts. 

“Survivor” Season 17 winner Bob Crowley hosts the Durham Warriors Survival Challenge to raise money for his nonprofit Durham Warriors Project, which provides free stays for veterans at Crowley’s Durham retreat, Maine Forest Yurts. 

Twelve members of the “Tinda” tripe squared off against 12 members of the “Umpe” tribe during the Durham Warriors Survival Challenge in Durham on Friday.

Liza Stratton and Nick Cloutier, both of Portland, compete during the “It’s in the Bag” challenge during the Durham Warriors Survival Challenge in Durham on Friday.

Durham Warriors Survival Challenge contestant Susie Smith lifts her canteen during a toast in Durham on Friday. 

Abby Ackerman lifts the letter “R” block during the “Building Blocks” challenge at the Durham Warriors Survival Challenge in Durham on Friday.