The 2025 event has concluded.

Boulder Boulder

Boulder, CO, USA • May 26, 2025
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rain Partly cloudy throughout the day with rain.

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The Bolder Boulder (styled as BOLDERBoulder and previously BolderBOULDER) is an annual 10-kilometer run in Boulder, Colorado. The most recent race featured over 54,000 runners, walkers, and wheelchair racers, making it the second largest 10k race in the US and the fifth largest road race in the world. It has one of the largest non-marathon prize purses in road racing. Wikipedia

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When is the 2025 Boulder Boulder?

The 2025 Boulder Boulder will be held on Monday May 26, 2025.

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Historical Weather & Results

RunScore
Run Score: 8
Temp
66°F
Min/Max
50°/67°F
Dew
37°F
Days of Rain
3/24
Wind
8mph
Tap a row for details.
YearLow / HighRain

Boulder Boulder 2024 Weather History

Clear conditions throughout the day.

2024
clear-day
55°/ 74°-
Run Score: 8

Boulder Boulder 2023 Weather History

Clear conditions throughout the day.

2023
clear-day
54°/ 77°-
Run Score: 8

Boulder Boulder 2022 Weather History

Clearing in the afternoon with early morning rain.

2022
cloudy
50°/ 62°-
Run Score: 8

Boulder Boulder 2021 Weather History

Becoming cloudy in the afternoon with late afternoon rain.

2021
clear-day
53°/ 63°-
Run Score: 8

Boulder Boulder 2020 Weather History

Clear conditions throughout the day.

2020
clear-day
52°/ 77°-
Run Score: 8

Boulder Boulder 2019 Weather History

Partly cloudy throughout the day with rain.

2019
partly-cloudy-day
42°/ 56°-
Run Score: 9

Boulder Boulder 2018 Weather History

Partly cloudy throughout the day with afternoon rain.

2018
cloudy
59°/ 64°-
Run Score: 8

Boulder Boulder 2017 Weather History

Becoming cloudy in the afternoon with rain.

2017
clear-day
50°/ 67°-
Run Score: 9

Boulder Boulder 2016 Weather History

Clear conditions throughout the day with afternoon rain.

2016
clear-day
52°/ 77°-
Run Score: 8

Boulder Boulder 2015 Weather History

Partly cloudy throughout the day with late afternoon rain.

2015
clear-day
44°/ 62°-
Run Score: 8

Boulder Boulder 2014 Weather History

Becoming cloudy in the afternoon.

2014
clear-day
56°/ 72°-
Run Score: 8

Boulder Boulder 2013 Weather History

Clear conditions throughout the day.

2013
clear-day
55°/ 80°-
Run Score: 8

Boulder Boulder 2012 Weather History

Clear conditions throughout the day.

2012
clear-day
51°/ 71°-
Run Score: 8

Boulder Boulder 2011 Weather History

Partly cloudy throughout the day.

2011
cloudy
55°/ 62°-
Run Score: 9

Boulder Boulder 2010 Weather History

Partly cloudy throughout the day.

2010
partly-cloudy-day
46°/ 65°-
Run Score: 9

Boulder Boulder 2009 Weather History

Partly cloudy throughout the day with rain.

2009
cloudy
43°/ 51°-
Run Score: 8

Boulder Boulder 2008 Weather History

Cloudy skies throughout the day with a chance of rain throughout the day.

2008
cloudy
37°/ 41°Light
Run Score: 7

Boulder Boulder 2006 Weather History

Partly cloudy throughout the day with late afternoon rain.

2006
partly-cloudy-day
38°/ 56°-
Run Score: 8

Boulder Boulder 2005 Weather History

Cloudy skies throughout the day with rain.

2005
partly-cloudy-day
41°/ 48°Light
Run Score: 8

Boulder Boulder 2004 Weather History

Partly cloudy throughout the day with morning rain or snow.

2004
partly-cloudy-day
34°/ 48°Light
Run Score: 6

Boulder Boulder 2003 Weather History

Partly cloudy throughout the day with late afternoon rain.

2003
partly-cloudy-day
67°/ 87°-
Run Score: 8

Boulder Boulder 2002 Weather History

Partly cloudy throughout the day.

2002
partly-cloudy-day
53°/ 79°-
Run Score: 9

Boulder Boulder 2001 Weather History

Cloudy skies throughout the day with late afternoon rain.

2001
partly-cloudy-day
50°/ 76°-
Run Score: 8

Boulder Boulder 2000 Weather History

Partly cloudy throughout the day.

2000
partly-cloudy-day
61°/ 87°-
Run Score: 7
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR
You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR