Saturday, September 18, 2027Westminster, CO

All-Out Fall Fest

3 events

Half MarathonHalfRoadStarts 8:00 AM
10K10KRoadStarts 8:30 AM
5K5KRoadStarts 8:40 AM

Half MarathonHalfRoadStarts 8:00 AM
10K10KRoadStarts 8:30 AM
5K5KRoadStarts 8:40 AM

Location

Approximate, from the race's ZIP code.

Typical race-day weatherIdeal weather · 87/100

High / low: 79° / 51°F; 26° / 10°C
Humidity: 42%; Dew point 36°F
Chance of rain: 22%
Wind: 7 mph; Average

Usually warm for a half marathon: about 60°F while racing.

Averages for this area and time of year over the last 20 years, from NASA POWER data. Not a forecast.

Past results

7% slowerFinish times are typically 7% slower than at other 5Ks.4 years, 496 finishers; men and women compared separately.
Typical timesFinish times are typical for half marathons.4 years, 391 finishers; men and women compared separately.
Typical timesFinish times are typical for 10Ks.4 years, 348 finishers; men and women compared separately.

Year	Event	Finishers	Median	Men	Women
2026	Half Marathon · Half	82	2:17:53	2:06:40	2:20:26
2026	10K · 10K	81	1:05:17	1:01:57	1:07:50
2026	5K · 5K	150	41:15	36:17	43:12
2025	Half Marathon · Half	95	2:13:02	2:11:46	2:15:35
2025	10K · 10K	91	1:02:41	57:01	1:06:57
2025	5K · 5K	137	35:43	30:48	36:17
2024	Half Marathon · Half	120	2:17:02	2:06:30	2:25:56
2024	10K · 10K	96	1:11:13	1:02:40	1:16:12
2024	5K · 5K	105	40:24	35:17	43:02
2023	Half Marathon · Half	94	2:12:27	2:01:02	2:19:46
2023	10K · 10K	80	1:05:19	59:36	1:09:00
2023	5K · 5K	104	35:52	30:59	40:14

Median finish times from results published on RunSignup. Keyrace keeps only these summaries, never individual results. A fast or slow field affects times as much as the course does.

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