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Half marathons near Denver (2026-27)

65 upcoming half marathons near Denver in the next 12 months. The next is Halloween Trick or Trot Run 5K/10K/13.1 Denver/Aurora on Saturday October 31 in Centennial.

All DenverDenver (8)Denver Suburbs (51)Foothills & Mountains (3)Fort Collins & Loveland (3)

• Sat31Oct

  Halloween Trick or Trot Run 5K/10K/13.1 Denver/Aurora

  Sat Oct 31 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  Reg. closed
• Sat31Oct

  PB&J Fuel Run 5K/10K/13.1 Denver/Aurora

  Sat Oct 31 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  Reg. closed
• Sat31Oct

  Hrca Backcountry Wilderness Half Marathon

  Sat Oct 31 · 9:00 AM · Lone Tree · Denver Suburbs

  Half marathonTrail

  from $85Goes up Oct 27
• Sun1Nov

  All-Out Kooky-Spooky

  Sun Nov 1 · 9:00 AM · Golden · Foothills & Mountains

  5K10KHalf marathonTrail

  from $50Goes up Oct 19
• Sat7Nov

  Turkey Trails- Denver

  Sat Nov 7 · 8:00 AM · Littleton · Denver Suburbs

  1 mile5K10KHalf marathonTrail

  from $22Goes up Oct 19
• Sat14Nov

  Run for Mental Health 5K/10K/13.1 Denver/Aurora

  Sat Nov 14 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat14Nov

  Veterans Day Freedom Run 5K/10K/13.1 Denver/Aurora

  Sat Nov 14 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat14Nov

  Salute to Veterans 5K/10K/Half Marathon - Denver

  Sat Nov 14 · 8:00 AM · Aurora · Denver Suburbs

  5K10KHalf marathon

  from $15Goes up Nov 8
• Sat21Nov

  Turkey Trek (13.1, 10k, 5k & 2k)

  Sat Nov 21 · 8:30 AM · Arvada · Denver Suburbs

  2K5K10KHalf marathon

  from $29Goes up Nov 1
• Sat28Nov

  Coffee Lovers Run 5K/10K/13.1 Denver/Aurora

  Sat Nov 28 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat28Nov

  Thanksgiving Gobble Trot Run 5K/10K/13.1 Denver/Aurora

  Sat Nov 28 · 7:30 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• 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
• 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
• Sun6Jun

  Colorado 13er (Half Marathon/10k/5k)

  Sun Jun 6 · 6:30 AM · Louisville · Denver Suburbs

  5K10KHalf marathonTrail

  from $35Goes up Mar 1
• Sat12Jun

  All-Out Summer Breeze

  Sat Jun 12 · 7:00 AM · Arvada · Denver Suburbs

  5K10KHalf marathonTrail

  from $35Goes up Dec 13
• Sat19Jun

  Run Juneteenth Day 5K/10K/13.1 Denver/Aurora

  Sat Jun 19 · 7:00 AM · Centennial · Denver Suburbs

  1 mile5K10KHalf marathon

  from $30
• Sat26Jun

  Slacker Half Marathon-Relay-4-Mile Races

  Sat Jun 26 · 7:30 AM · Georgetown · Foothills & Mountains

  4 milesHalf marathon

  from $35Reg. closed
• Sat10Jul

  All-Out Dog Days

  Sat Jul 10 · 7:00 AM · Westminster · Denver Suburbs

  5K10KHalf marathonTrail

  from $35Goes up Jan 11
• Sat17Jul

  Summer Splash Prairie Dog Half, 10k, & 5k

  Sat Jul 17 · 6:30 AM · Castle Rock · Denver Suburbs

  5K10KHalf marathonTrail

  from $39Goes up Apr 18
• Sat17Jul

  Heatwave Half Marathon/5K/10K - Denver

  Sat Jul 17 · 7:00 AM · Denver · Denver

  1 mile5K10KHalf marathon

  from $22Goes up Jan 19
• Sun1Aug

  Bound for Boston Marathon & Half Marathon - Denver

  Sun Aug 1 · 6:30 AM · Denver · Denver

  Half marathonMarathon

  from $45Reg. closed
• Sat7Aug

  All-Out Runapalooza

  Sat Aug 7 · 7:00 AM · Arvada · Denver Suburbs

  5K10KHalf marathonTrail

  from $35Goes up Feb 8
• Sun15Aug

  Erie Half & 5k

  Sun Aug 15 · 7:00 AM · Erie · Fort Collins & Loveland

  5KHalf marathon

  from $39Goes up May 17
• Sun22Aug

  Pioneer Prairie Dog Half, 10k & 5k

  Sun Aug 22 · 7:15 AM · Westminster · Denver Suburbs

  5K10KHalf marathon

  from $39Goes up May 24
• Mon6Sep

  Labor Day Half Marathon

  Mon Sep 6 · 7:00 AM · Parker · Denver Suburbs

  5K10KHalf marathonTrail

  from $30Goes up Apr 30
• Sat11Sep

  Golden Harvest Half Marathon & 5K/10K - Denver

  Sat Sep 11 · 8:00 AM · Denver · Denver

  1 mile5K10KHalf marathon

  from $22Goes up Mar 16
• Sat18Sep

  All-Out Fall Fest

  Sat Sep 18 · 8:00 AM · Westminster · Denver Suburbs

  5K10KHalf marathonTrail

  from $35Goes up Mar 19
• Sat2Oct

  Spooky Sprint - Denver

  Sat Oct 2 · 9:00 AM · Denver · Denver

  1 mile5K10KHalf marathon

  from $25Goes up Apr 6
• Sun10Oct

  Westy Half & 5k

  Sun Oct 10 · 8:00 AM · Westminster · Denver Suburbs

  5KHalf marathon

  from $39Reg. closed