May 2027 races in Denver–Boulder

There are 6 running events listed in Denver–Boulder for May 2027 — 5 5K, 3 10K, 1 Half Marathon, 1 Marathon, 1 Trail Run — starting with Greenland Trail Races on Sat, May 1, 2027. Every listing shows the date, venue, and distances, with a direct link to registration.

• Sat, May 1, 2027 Greenland Trail Races 1532 E Noe Rd · Larkspur, CO · From $25 5KTrail Run Trail
• Sun, May 2, 2027 Colorado Marathon Poudre Canyon · Fort Collins, CO 5K10KHalf MarathonMarathon Road
• Sun, May 2, 2027 Emerge 5K 5565 Reservoir Rd · Boulder, CO 5K Road
• Sun, May 9, 2027 Colorado Women's Classic - Westminster 10600 Westminster Blvd · From $35 5K10K Road
• Sun, May 9, 2027 Denver Mother's Day 5K 3201 17th St · Denver, CO · From $27 5K Road
• Mon, May 31, 2027 BOLDERBoulder Folsom Field · Boulder, CO 10K Road

Quick answers

How many races are there in Denver–Boulder in May 2027?

6 running events are listed in Denver–Boulder for May 2027, from Greenland Trail Races on Sat, May 1, 2027 to BOLDERBoulder on Mon, May 31, 2027. Every listing links directly to registration.

What distances can I race in Denver–Boulder in May?

The May 2027 calendar in Denver–Boulder includes 5 5K, 3 10K, 1 Half Marathon, 1 Marathon, 1 Trail Run.

What is the first race of May 2027 in Denver–Boulder?

Greenland Trail Races on Sat, May 1, 2027 at 1532 E Noe Rd.