Marathons in North America in October 2026
3 marathons, 2 half marathons and 2 ultras in North America in October 2026.
The flattest is the UWI SPEC International Half Marathon (30 m of climbing); the hilliest is the Javelina Jundred 100 Mile (1,920 m).
For cool racing conditions, the Marine Corps Marathon usually starts around 10°C.
The biggest field is at the Marine Corps Marathon, with about 30,000 finishers.
Marine Corps Marathon
Arlington, United States
25 Oct 2026Today
Gain
213 m
Start temp
10°C
Entry
$240
Top 10, men 40–49: 2:48 (3:59/km)
MarathonOpen entryhistoricbig city
Niagara Falls International Marathon
Niagara Falls, Canada
25 Oct 2026Today
Gain
60 m
Start temp
8°C
Entry
$125
Top 10, men 40–49: No data
MarathonOpen entryscenicsmall field
Aguascalientes Marathon
Aguascalientes, Mexico
25 Oct 2026Today
Gain
100 m
Start temp
14°C
Entry
—
Top 10, men 40–49: No data
MarathonOpen entryaltitude
Aguascalientes Half Marathon
Aguascalientes, Mexico
25 Oct 2026Today
Gain
60 m
Start temp
14°C
Entry
—
Top 10, men 40–49: No data
Half marathonOpen entryaltitude
UWI SPEC International Half Marathon
St. Augustine, Trinidad and Tobago
25 Oct 2026Today
Gain
30 m
Start temp
24°C
Entry
$50
Top 10, men 40–49: No data
Half marathonOpen entryfast
Javelina Jundred 100 Mile
Fountain Hills, United States
31 Oct 2026In 6 days
Gain
1,920 m
Start temp
14°C
Entry
$525
Top 10, men 40–49: No data
161 kmTrailOpen entrydesert
Javelina Jundred 100K
Fountain Hills, United States
31 Oct 2026In 6 days
Gain
1,205 m
Start temp
14°C
Entry
$375
Top 10, men 40–49: No data
100 kmTrailOpen entrydesert