Bolder Boulder race director Cliff Bosley sent a letter to race participants today about increased security at the Memorial Day 10K in light of the fatal bombing at Monday's Boston Marathon.

In the letter, Bosley said Boulder race organizers will be connecting with their counterparts across the country who are hosting large races in coming weeks.

Those races include Pat's Run in Tempe, Ariz., Lilac Bloomsday in Spokane, Wash., Indy Mini in Indianapolis, the Pittsburgh Marathon and Bay to Breakers in San Francisco.

"We're in a good spot in that we're 40 days out from the race," Bosley said in an interview. "We'll be able to see what other people are doing and how it worked and borrow those ideas."

In Boston, bombs planted near the finish line exploded and killed three people and injured about 180 others.

In the aftermath, Bosley said Boulder race organizers have met with police and security officers for in-depth conversations about security.

Every year, he said, there are plans in place for contingencies like medical emergencies or natural disasters.

"This year, that planning takes on an added dimension," he wrote in the letter. "In the coming weeks, we will have additional meetings with police, city and race officials with an eye on heightened security and safety."

The Bolder Boulder 10K has drawn roughly 54,000 participants in past years.

The annual Memorial Day Race is on May 27 and will be celebrating its 35th anniversary.

"The timing of the Bolder Boulder on Memorial Day has always celebrated those who fought for our nation's security," Bosley said in the letter. "This year, that takes on additional meaning. We look forward to you joining us to celebrate this special day and to honor not only those who fought and died for our country, but also for our friends and colleagues in Boston."

Contact Camera Staff Writer Brittany Anas at 303-473-1132 or