Home / Denver & Boulder / Fall 2026 / Half marathons
Fall half marathons near Denver (2026)
11 half marathons on the calendar from September to November, starting with Halloween Trick or Trot Run 5K/10K/13.1 Denver/Aurora on Saturday October 31. 5 of them publish an upcoming price increase, so signing up early saves money.
All fall races5K races (45)10K races (16)Half marathons (11)Trail races (13)
By date
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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 -
PB&J Fuel Run 5K/10K/13.1 Denver/Aurora
Sat Oct 31 · 7:30 AM · Centennial · Denver Suburbs
1 mile5K10KHalf marathon
Reg. closed -
Hrca Backcountry Wilderness Half Marathon
Sat Oct 31 · 9:00 AM · Lone Tree · Denver Suburbs
Half marathonTrail
from $85Goes up Oct 27 -
from $50Goes up Oct 19
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Turkey Trails- Denver
Sat Nov 7 · 8:00 AM · Littleton · Denver Suburbs
1 mile5K10KHalf marathonTrail
from $22Goes up Oct 19 -
Run for Mental Health 5K/10K/13.1 Denver/Aurora
Sat Nov 14 · 7:30 AM · Centennial · Denver Suburbs
1 mile5K10KHalf marathon
from $30 -
Veterans Day Freedom Run 5K/10K/13.1 Denver/Aurora
Sat Nov 14 · 7:30 AM · Centennial · Denver Suburbs
1 mile5K10KHalf marathon
from $30 -
Salute to Veterans 5K/10K/Half Marathon - Denver
Sat Nov 14 · 8:00 AM · Aurora · Denver Suburbs
5K10KHalf marathon
from $15Goes up Nov 8 -
Turkey Trek (13.1, 10k, 5k & 2k)
Sat Nov 21 · 8:30 AM · Arvada · Denver Suburbs
2K5K10KHalf marathon
from $29Goes up Nov 1 -
Coffee Lovers Run 5K/10K/13.1 Denver/Aurora
Sat Nov 28 · 7:30 AM · Centennial · Denver Suburbs
1 mile5K10KHalf marathon
from $30 -
Thanksgiving Gobble Trot Run 5K/10K/13.1 Denver/Aurora
Sat Nov 28 · 7:30 AM · Centennial · Denver Suburbs
1 mile5K10KHalf marathon
from $30