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Race Overview
The All-Out Fall Fest Half Marathon in Westminster, Colorado, offers runners a scenic journey along the Big Dry Creek Trail, leading to the picturesque Standley Lake Regional Park. Participants enjoy a mix of paved and gravel paths, with breathtaking views of the Flatirons and a notable stretch near the dam. The event embraces 80s nostalgia, adding a fun and energetic vibe to the race experience.
WikipediaFAQ
When is the 2026 All-Out Fallfest Half Marathon?
The 2026 All-Out Fallfest Half Marathon will be held on Saturday September 19, 2026.
All-Out Fallfest Half Marathon Weather History
All-Out Fallfest Half Marathon Weather Averages
Average Temp: 64°, Average Low: 50°, Average High: 79°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 54° | 61° | 66° | 70° | 74° | 76° | 78° |
| Feel | 54° | 61° | 66° | 70° | 73° | 75° | 76° |
| Rain | - | - | - | - | - | - | - |
| Wind | 1mph | 2mph | 3mph | 4mph | 4mph | 4mph | 5mph |
| Dew | 42° | 42° | 40° | 39° | 38° | 36° | 34° |
| RunScore |  | | | | | | |
All-Out Fallfest Half Marathon 2025
Sep 13, 2025
Clear conditions throughout the day with rain.
Low: 55°, High: 74°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 55° | 66° | 71° | 72° | 73° | 74° |  74° |
| Feel | 55° | 66° | 71° | 72° | 73° | 74° | 74° |
| Rain | - | - | - | - | - | - | - |
| Wind | 0mph | 0mph | 4mph | 5mph | 7mph | 0mph | 3mph |
| Dew | 47° | 45° | 45° | 45° | 45° | 45° | 43° |
| RunScore | | | | | |  | |
All-Out Fallfest Half Marathon 2024
Sep 14, 2024
Clear conditions throughout the day.
Low: 55°, High: 88°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 59° | 67° | 74° | 74° | 76° | 83° | 87° |
| Feel | 59° | 67° | 74° | 74° | 76° | 81° | 83° |
| Rain | - | - | - | - | - | - | - |
| Wind | 0mph | 3mph | 1mph | 0mph | 4mph | 5mph | 7mph |
| Dew | 39° | 39° | 39° | 40° | 41° | 36° | 31° |
| RunScore | | | | | | | |
All-Out Fallfest Half Marathon 2022
Sep 16, 2022
Partly cloudy throughout the day with afternoon rain.
Low: 50°, High: 76°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 55° | 62° | 67° | 70° | 74° | 74° | 76° |
| Feel | 55° | 62° | 67° | 70° | 74° | 74° | 76° |
| Rain | - | - | - | - | - | - | - |
| Wind | 1mph | 1mph | 1mph | 5mph | 3mph | 1mph | 7mph |
| Dew | 48° | 46° | 44° | 45° | 45° | 43° | 41° |
| RunScore | | | | | | | |
All-Out Fallfest Half Marathon 2021
Sep 18, 2021
Clear conditions throughout the day.
Low: 46°, High: 90°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 51° | 59° | 67° | 73° | 80° | 83° | 88° |
| Feel | 51° | 59° | 67° | 73° | 79° | 81° | 84° |
| Rain | - | - | - | - | - | - | - |
| Wind | 0mph | 0mph | 0mph | 0mph | 0mph | 5mph | 6mph |
| Dew | 43° | 42° | 41° | 35° | 37° | 34° | 33° |
| RunScore | | | | | | | |
All-Out Fallfest Half Marathon 2020
Sep 19, 2020
Clear conditions throughout the day.
Low: 52°, High: 84°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 58° | 66° | 71° | 76° | 81° | 80° | 83° |
| Feel | 58° | 66° | 71° | 76° | 79° | 79° | 81° |
| Rain | - | - | - | - | - | - | - |
| Wind | 2mph | 5mph | 7mph | 6mph | 4mph | 5mph | 5mph |
| Dew | 46° | 47° | 42° | 39° | 35° | 35° | 30° |
| RunScore | |  | | | | | |
All-Out Fallfest Half Marathon 2019
Sep 21, 2019
Becoming cloudy in the afternoon.
Low: 51°, High: 75°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 56° | 63° | 66° | 69° | 73° | 75° | 74° |
| Feel | 56° | 63° | 66° | 69° | 73° | 75° | 74° |
| Rain | - | - | - | - | - | - | - |
| Wind | 1mph | 1mph | 6mph | 8mph | 7mph | 8mph | 3mph |
| Dew | 29° | 32° | 32° | 32° | 28° | 24° | 23° |
| RunScore | | | | | | | |
All-Out Fallfest Half Marathon 2018
Sep 22, 2018
Clear conditions throughout the day.
Low: 46°, High: 85°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 53° | 61° | 68° | 76° | 81° | 84° | 85° |
| Feel | 53° | 61° | 68° | 76° | 79° | 81° | 82° |
| Rain | - | - | - | - | - | - | - |
| Wind | 1mph | 3mph | 1mph | 4mph | 7mph | 8mph | 5mph |
| Dew | 38° | 38° | 36° | 32° | 25° | 23° | 22° |
| RunScore | | | | | | | |
All-Out Fallfest Half Marathon 2017
Sep 23, 2017
Partly cloudy throughout the day with rain.
Low: 44°, High: 53°, Heavy Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp |  48° | 50° | 51° | 52° | 52° |  51° | 51° |
| Feel | 46° | 48° | 51° | 52° | 52° | 51° | 51° |
| Rain | - | - | - | - | - | light | light |
| Wind | 4mph | 4mph | 3mph | 6mph | 7mph | 3mph | 5mph |
| Dew | 41° | 41° | 40° | 41° | 43° | 44° | 44° |
| RunScore | | | | | | | |
All-Out Fallfest Half Marathon 2015
Sep 26, 2015
Clear conditions throughout the day.
Low: 49°, High: 85°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 52° | 59° | 65° | 70° | 74° | 78° | 81° |
| Feel | 52° | 59° | 65° | 70° | 74° | 78° | 79° |
| Rain | - | - | - | - | - | - | - |
| Wind | 2mph | 1mph | 0mph | 2mph | 2mph | 4mph | 4mph |
| Dew | 45° | 45° | 45° | 45° | 44° | 43° | 41° |
| RunScore | | | | | | | |