5K races in Boulder

6 upcoming races. See all races in Boulder or 5k races worldwide.

• Colleen De Reuck XC Classic - 1K XC - 10 Years & Under
  Oct 31, 2026 · 1 km
• Colleen De Reuck XC Classic - 3K XC - 16 Years & Under
  Oct 31, 2026 · 3 km
• Colleen De Reuck XC Classic - 5K XC - Open
  Oct 31, 2026 · 5 km
• Alpine Bank Boulder Thanksgiving Day 5K - 5K
  Nov 26, 2026 · 5 km
• Emerge 5K - Emerge 5K 2027
  May 2, 2027 · 5 km
• Alpha 5K Challenge - Alpha 5K Challenge
  Jun 12, 2027 · 5 km