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Winter half marathons near Denver (2026-27)

18 half marathons on the calendar from December to February, starting with All-Out Fa La La on Saturday December 5. 6 of them publish an upcoming price increase, so signing up early saves money.

All winter races5K races (34)10K races (21)Half marathons (18)Trail races (5)

• Sat5Dec

  All-Out Fa La La

  Sat Dec 5 · 9:00 AM · Westminster · Denver Suburbs

  5K10KHalf marathonTrail

  from $50Goes up Nov 22
• Sat12Dec

  Run for Breast Cancer 5K/10K/13.1 Denver/Aurora

  Sat Dec 12 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat12Dec

  Sunrise Marathon 5K/10K/13.1 Denver/Aurora

  Sat Dec 12 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat26Dec

  A Merry Christmas Run 5K/10K/13.1 Denver/Aurora

  Sat Dec 26 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat26Dec

  New Year's Run 5K/10K/13.1 Denver/Aurora

  Sat Dec 26 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat9Jan

  All-Out Polar Prowl

  Sat Jan 9 · 9:00 AM · Arvada · Denver Suburbs

  5K10KHalf marathonTrail

  from $50Goes up Dec 27
• Sat16Jan

  MLK Jr. Freedom Run 5K/10K/13.1 Denver/Aurora

  Sat Jan 16 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat16Jan

  Sunrise Marathon 5K/10K/13.1 Denver/Aurora

  Sat Jan 16 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat30Jan

  Coffee Lover Run Denver/Aurora

  Sat Jan 30 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat30Jan

  Run for Donut Denver/Aurora

  Sat Jan 30 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat30Jan

  Time Travel Half-Marathon/5K/10K - Denver

  Sat Jan 30 · 9:00 AM · Westminster · Denver Suburbs

  1 mile5K10KHalf marathon

  from $20Goes up Oct 27
• Sat6Feb

  All-Out Mardi Crawl

  Sat Feb 6 · 9:00 AM · Arvada · Denver Suburbs

  5K10KHalf marathonTrail

  from $45Goes up Nov 7
• Sun7Feb

  Old Man Winter Bike Rally & Run

  Sun Feb 7 · 9:30 AM · Lyons · Fort Collins & Loveland

  5K10KHalf marathon

  from $49Goes up Nov 2
• Sat13Feb

  Run for Chocolate 5K/10K/13.1 Denver/Aurora

  Sat Feb 13 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat13Feb

  Valentine's Day Run 5K/10K/13.1 Denver/Aurora

  Sat Feb 13 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sun14Feb

  Ralston Creek Half Marathon & 5k

  Sun Feb 14 · 9:00 AM · Arvada · Denver Suburbs

  5KHalf marathon

  from $25Goes up Nov 1
• Sat27Feb

  Run For Mental Health Denver/Aurora

  Sat Feb 27 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat27Feb

  Run Together Against Breast Cancer Denver/Aurora

  Sat Feb 27 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30

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