Autumn Run 10K

Buena Vista, CO, USA · September 18, 2027·

60°·65° high·Calm·Dry

Weather

Pace Calc

Race Day Weather

60°at start

76° high

Light

Dry

Your goal

0:00:00

to see the forecast where you'll be

Comfortable temps, big temp swing

Starting at 60°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Temps will climb significantly to 76°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 322 days

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

4 PM

5 PM

6 PM

Pre-raceRace windowPost-race

Pace Calculator

Distance: 6.2mi

Finish time

0:00:00

HH:MM:SS

Pace

—

Enter a finish time to see what race day does to it.

Pace

—

Enter a finish time to see your race-day finish and True Effort, with what the weather, wind and hills do to it.

Common Goals:

Get forecast alerts for Autumn Run 10K

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Info

The Autumn Run 10K starts and finishes at McPhelemy Park in Buena Vista, Colorado, and crosses the footbridge by Town Lake. It climbs gently west on Crossman Avenue, with a view of Mt. Princeton around mile 1, then turns onto County Road 361. After the first third the grade turns downhill, and the course follows West Main Street on a slight, steady descent to the finish at the park.

Website

Race weekend

Saturday, September 18

9:15 AMHalf Marathon (13.1 mi)

9:30 AM10K (6.2 mi)

9:30 AM5K (3.1 mi)

Course Map

FAQ

When is the 2027 Autumn Run 10K?

The 2027 Autumn Run 10K will be held on Saturday September 18, 2027.

What will the weather be like for the 2027 Autumn Run 10K?

The forecast calls for a high of 75°F and a low of 46°F with a 4% chance of rain. Check our detailed hourly forecast above for the best 10K race plan.

Historical Weather

Based on 9 years of data

Avg Temp

54°F

L:51° H:57°

RunScore

Conditions

Rain Freq

0 of 9 yrs

Wind3mph

Dew31°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Autumn Run 10K Partly cloudy throughout the day with morning rain. 2026	50°/57°	-	44°
2025 Autumn Run 10K Partly cloudy throughout the day with afternoon rain. 2025	52°/55°	-	38°
2024 Autumn Run 10K Becoming cloudy in the afternoon with late afternoon rain. 2024	54°/62°	-	30°
2023 Autumn Run 10K Clear conditions throughout the day. 2023	44°/50°	-	37°
2022 Autumn Run 10K Partly cloudy throughout the day. 2022	52°/58°	-	34°
2019 Autumn Run 10K Clear conditions throughout the day. 2019	50°/57°	-	17°
2018 Autumn Run 10K Clear conditions throughout the day. 2018	61°/66°	-	20°
2017 Autumn Run 10K Partly cloudy throughout the day. 2017	52°/55°	-	32°
2016 Autumn Run 10K Clear conditions throughout the day. 2016	48°/53°	-	31°

More CO Races

BOLDERBoulder

2027-05-31 · 10.000km · Boulder, CO, USA

Steamboat Marathon

2027-06-06 · 42.200km · Steamboat Springs, CO, USA

Estes Park Marathon

2027-06-20 · 42.200km · Estes Park, CO, USA

Hardrock 100

2027-07-09 · 160.900km · Silverton, CO, USA

Leadville Trail 100

2027-08-21 · 160.934km · Leadville, CO, USA

Mt. Sneffels Half Marathon

2027-08-21 · 21.100km · Ouray, CO, USA

Free guidesRace Morning Guide·Race Day Gear Guide·Pacing Strategy Guide