Positive response from last year's runners prompted Bolder Boulder organizers to stay colorful.

For only the second time since 1987, this year's official race shirts will be colored rather than white. The shirts will be available in green, blue and coral and will feature the slogan "RUNBELIEVABLE."

"We really want to embody the celebration of running and the celebration of the race, and we feel like 'RUNBELIEVABLE' embodies that. We want to get people excited about what an awesome experience the Bolder Boulder is," race spokeswoman Stephanie Winslow-Sell said.

Last year was the first since 1987 that race shirts were not white.

The 10k race will be held May 26. When they sign up, runners can chose either a long- or short-sleeved T-shirt or short-sleeved technical shirt from Helly Hansen. Or they can purchase all three as a package.

The T-shirts are made from a blend of cotton and polyester designed to reduce moisture and shrinkage, according to a news release, and will be "heather sage" for men and "heather sapphire" for women.

The technical T-shirts are equipped with performance-enhancing technology and will be featured in "racer blue" for men and "coral" for women.

"The Helly Hansen shirt is made with this really cool technology that pulls away heat and moisture from the skin. We're excited to have our participants train and run with them," Winslow-Sell said.


There also will be an "electric blue" kid's T-shirt available. Helly Hansen gear can be ordered in small and extra-small, as well.

If runners aren't interested in purchasing a T-shirt, they can donate the cost ($45 for short-sleeved, $50 for long-sleeved, $60 for technical or $75 for all three) to the University of Colorado Scholarship Fund or the humanitarian aid organization Samaritan's Purse.

"We do this every year, and we have quite a few people take advantage of that. We probably have about 2,000 people per year donate the dollars back," Winslow-Sell said.

The 2014 T-shirts were designed by Genesis Inc. of Denver, which has been designing Bolder Boulder gear since 1979.