Each Memorial Day, the streets of Boulder come alive with tens of thousands of runners, walkers, spectators, and costumed characters celebrating one of the most beloved races in America—the BOLDERBoulder. But how did this spirited 10K transform from a grassroots race into a world-class running event?

Let’s lace up and take a look back.

It All Started in 1979

The idea came from Steve Bosley, then president of the University of Colorado’s credit union. Inspired by the growing popularity of running, Bosley wanted to create a community race that wasn’t just about speed—it was about spirit. The first BOLDERBoulder launched on Memorial Day 1979 with 2,700 participants. The course was simple, the vibe was grassroots, but the seed of something much bigger had been planted.

From Local Race to National Powerhouse

Fast forward four decades, and the BOLDERBoulder now hosts over 50,000 participants annually, making it one of the largest 10Ks in the world. The course winds through the streets of Boulder with cheering crowds, live bands, belly dancers, and slip-n-slides, creating an unforgettable race-day experience.

The race has also drawn some of the world’s best athletes. Olympians and professional runners have graced the streets of Boulder in the International Team Challenge, which features elite teams from Kenya, Ethiopia, and the U.S. battling it out for top honors.

Folsom Field: A Finish Unlike Any Other

What makes the BOLDERBoulder truly unique is its grand finale. Runners charge into the iconic Folsom Field, home of the Colorado Buffaloes, where they cross the finish line in front of thousands of cheering fans. There’s nothing quite like hearing your name announced on the stadium speakers as you complete your 10K journey.

And that finish line isn’t just for runners. Every Memorial Day, the race concludes with a moving tribute to military service members—complete with flyovers, skydivers, and a solemn remembrance ceremony that reminds everyone why the day matters.

Learn more about Memorial Day and its national significance.

Iconic Moments and Boulder Magic

The BOLDERBoulder is known for its wild spirit. Over the years, it’s featured:

• Runners in gorilla suits, wedding dresses, and superhero costumes

• Boulder’s elite runners racing alongside kids and grandparents

• A parachute team landing right inside the stadium

• Boulderites turning front lawns into water stations and party zones

Every year brings new stories, laughter, and unforgettable scenes that showcase Boulder’s quirky charm and deep community pride.

More Than a Race—A Boulder Tradition

Beyond the running, the BOLDERBoulder is a celebration of Boulder itself. It embodies the city’s active lifestyle, creative flair, and love for community. Locals plan their Memorial Day weekends around it. Visitors return year after year just to feel the energy.

This iconic race has become a symbol of Boulder’s spirit—fast, fun, and full of heart.

Ready to Cheer or Run?

Whether you’re toeing the line or lining the streets with a coffee in hand, the BOLDERBoulder brings Boulder together in a way few events can. It’s more than a 10K—it’s part of the city’s identity.

Learn more about Boulder and its vibrant community at AboutBoulder.com.

For additional race history and stats, visit the official BOLDERBoulder website.

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