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Spring half marathons near Denver (2027)

20 half marathons on the calendar from March to May, starting with Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver on Saturday March 6. 9 of them publish an upcoming price increase, so signing up early saves money.

All spring races5K races (24)10K races (18)Half marathons (20)Trail races (4)

• Sat6Mar

  Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver

  Sat Mar 6 · 8:00 AM · Denver · Denver

  1 mile5K10KHalf marathon

  from $22Goes up Nov 9
• Sat20Mar

  St. Paddy's Day Lucky Run 5K/10K/13.1 Denver/Aurora

  Sat Mar 20 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat20Mar

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

  Sat Mar 20 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sun21Mar

  All-Out Spring Fever

  Sun Mar 21 · 9:00 AM · Golden · Foothills & Mountains

  5K10KHalf marathonTrail

  from $40Goes up Dec 22
• Sat27Mar

  Always Hope Easter Run Denver/Aurora

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

  1 mile5K10KHalf marathon

  from $30
• Sat27Mar

  SuperHeroes Run Denver/Aurora

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

  1 mile5K10KHalf marathon

  from $30
• Sun4Apr

  Three Creeks Half Marathon

  Sun Apr 4 · 8:00 AM · Englewood · Denver Suburbs

  Half marathon

  from $65Goes up Dec 1
• Sat10Apr

  Run for PB&J 5k/10k/13.1 Denver/Aurora

  Sat Apr 10 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat10Apr

  Sloth Run 5K/10K/13.1 Denver/Aurora

  Sat Apr 10 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sun11Apr

  Platte River Half-Marathon, Relay & 5k

  Sun Apr 11 · 7:00 AM · Littleton · Denver Suburbs

  5KHalf marathonTrail

  from $45Goes up Nov 1
• Sun11Apr

  Spring Fling Prairie Dog Half, 10k, & 5k

  Sun Apr 11 · 8:00 AM · Arvada · Denver Suburbs

  5K10KHalf marathon

  from $39Goes up Jan 11
• Sat24Apr

  Coffee Lover Run Denver/Aurora

  Sat Apr 24 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat24Apr

  Run for Donut Denver/Aurora

  Sat Apr 24 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat24Apr

  All-Out Beat the Heat

  Sat Apr 24 · 8:00 AM · Westminster · Denver Suburbs

  5K10KHalf marathonTrail

  from $35Goes up Oct 25
• Sun25Apr

  DoNot Stop Half Marathon/5K/10K - Denver

  Sun Apr 25 · 8:00 AM · Denver · Denver

  1 mile5K10KHalf marathon

  from $22Goes up Jan 20
• Sun2May

  Longmont Half & 5k (LM Half)

  Sun May 2 · 7:30 AM · Longmont · Fort Collins & Loveland

  5KHalf marathon

  from $39Goes up Feb 1
• Sat8May

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

  Sat May 8 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sun9May

  Hometown Half Marathon/5K/10K - Denver

  Sun May 9 · 7:00 AM · Denver · Denver

  1 mile5K10KHalf marathon

  from $22Goes up Nov 11
• Sun16May

  Denver Colfax Marathon

  Sun May 16 · Denver · Denver

  10 milesHalf marathonMarathon

  see site
• Sat29May

  SuperHeroes Run Denver/Aurora

  Sat May 29 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30

• Fall 202653 races
• Winter 2026-2737 races
• Summer 202726 races