run.Windsor, Stronger Together

Our race series creates community through running, while celebrating the businesses, organizations and people that make Windsor great!

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Professionally timed endurance events including 5k, 10k, Half Marathon, Full Marathon and Weld County's first Ultra Marathon.


Free group fun runs, seminars and events connecting the Northern Colorado community and local businesses, organizations and nonprofits. Learn more about our story.


The Wild West Relay and Flaming Foliage Relays cover the most beautiful parts of Colorado, completed as a team. These adventures are an experience you'll never forget!


All events give a portion of proceeds back to local nonprofits through Windsor Gives, including Adopt-A-Family, iHeart Humanity, Imagine Zero, Realities For Children and more.

run.Windsor 2023 Race Series

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Free Fun Runs + Run Club

Punch Card Reveal + Windsor Marathon Shake out Run - Thursday, October 5th - 6:00 PM @ Peculier Ales in Windsor, CO

5K on a Tuesday - October 10th - 5:30 PM @ Mash Lab Brewing + Kitchen

Group run - Thursday, October 19th - 6:00 PM @ Peculier Ales in Windsor, CO

5K on a Tuesday - October 24th - 5:30 PM @ Mash Lab Brewing + Kitchen

Learn more about our Run Club

run.Windsor Run Club

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Windsor Marathon

  • Date: October 8, 2023
  • Time: 7 am and later
  • Location: The Island at Pelican Lakes in Water Valley

Full Marathon, Half Marathon, 10K and 5K

Welcome to the 4th annual Windsor Marathon Event, held by run.Windsor

Starting and ending at The Island at Pelican Lakes in Water Valley, with a great after party including a gourmet breakfast, drinks, music, kids zone and more!

There's a distance for everyone with a kids fun run, 5k, 10k, half and full marathon. A portion of proceeds go to Windsor Gives to support Realities for Children.



Turkey Trot

  • Date: November 23, 2023
  • Time: 9 am
  • Location: Pelican Lakes Golf Course

The annual Pelican Lakes Turkey Trot is back, brought to you by run.Windsor!

Run or Walk this family friendly 5K, benefitting Athletes In Tandem and the Weld Food Bank. Finish your race off with a free beer donated from High Country Beverage, served at the Pelican Lakes Sand Bar!


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Santa Catch Race

  • Date: December 16, 2023
  • Time: 9 am
  • Location: Power To Play, Windsor CO

5k - 10k Run/Walk Kids Fun Run

It’s time to Catch Santa, as we raise funds to support Adopt-A-Family through Serve 6.8. This fun 5k, 10k and free kids fun run is sure to put you in the holiday spirit, as we rock out to holiday jingles, sip free hot cocoa and spread holiday cheer for all to hear, and those who need it most!


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  • Date: March 11, 2023
  • Time: 9:00 AM
  • Location: Eastman Park
  • 5K - 10K - 15K - Kids Fun Run

Run or walk on the beautiful Poudre River Trail to earn your lucky socks, free beer/seltzer provided by High Hops Brewery, finisher medal, after party and more! This race benefits Women Optimizing Women (WOW)...providing education, resources, and support to help improve their lives and the lives around them. Inspire. Empower. Advocate.




  • Date: May 27, 2023
  • Time: Varies by distance
  • Location: Kodak Trailhead
  • 7K - Half - Full - 50K - Relay Options

Run or Ruck in the spirit of Weld Your Mettle - digging deep and going a little further! With the shortest distance of 4.3 miles up to the 33 mile race, and relay options (each runner averaging 5 miles), there's something for everyone! Proceeds benefit Health4Heroes. Enjoy an after party complete with Weld Your Mettle IPA by Peculier Ales


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  • Date: June 24, 2023
  • Time: 8:00 am
  • Location: Boardwalk Park
  • 5K & 10K Run, Walk, & Ruck
  • Kids Fun Run

Celebrate America in the heart of Downtown Windsor! Sponsored by Peculier Ales, this 5k, 10k run, walk, 35 lb military ruck and rockin' Kids Fun Run is the best way to celebrate the Red, White and BREW. Proceeds go to benefit the nonprofit Imagine Zero- supporting suicide prevention and awareness



Wild West Relay

21st Annual Wild West Relay

Friday August 2 through Saturday August 3, 2024.

The Wild West Relay covers 200 scenic miles, with 36 legs, beginning in the foothills of beautiful Fort Collins before sending runners deep into the heart of the Rocky Mountains, over two mountain passes and finishing in Steamboat Springs, CO.

This life changing relay road race is a team-oriented adventure with experiences and views you'll never forget. Each team consists of either twelve runners and two vehicles (the vast majority of the teams) or six runners and one vehicle (Ultra teams), or an odd amount of runners of any other quantity.



Flaming Foliage Relay

11th Annual Flaming Foliage Relay

Friday September 6, 2024 - Saturday September 7, 2024

Flaming Foliage is an overnight team relay race adventure with single track trails, from Idaho Springs to beautiful Buena Vista, over Guanella, Georgia & Fremont Passes. Covering 165 miles, this life changing relay road race is an adventure with experiences and views you'll never forget.

Each team consists of either ten runners, an Ultra team of 4-5, or a Super Ultra team of 1-3


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Windsor Wiesn Mile & 5K

  • Date: September 23, 2023
  • Time: 9 am Walk or Run
  • Location: Downtown Windsor

One Mile & 5k

Kick off Windsor Oktoberfest with a fun and fast 1 Mile Run, part of the NOCO Mile Race Series, or a 5K. Wear your favorite German inspired costume and stick around after for an authentic German lunch, beer and full Oktoberfest party in collaboration with the Windsor Area Chamber of Commerce


Join the run.Windsor RUN GROUP

Discounts on run.Windsor Events, training shirt, perks from our run group partners, exclusive invites to group runs + motivational speaking events and more!

Join Today!


Lucky Brew Race 2022 Mar 12 2022

run.Windsor is locally owned and operated by Colorado native Mandy Mullen. Along with her family and team, her mission is to positively impact the health of Northern Colorado through her passion for running. Through races ranging in distance from 5k to ultramarathon to kids fun runs, run.Windsor’s endurance events celebrate the people, businesses and organizations who make Windsor great. They aspire to better our community’s overall mental, emotional and physical wellness through movement.

run.Windsor supports the economic health of Windsor through their active role as a member of the Windsor Area Chamber of commerce, collaborative efforts with local businesses and championing other entrepreneurs. A portion of proceeds from every event are also donated to local nonprofits.

I love all of the events

I love all of the events from Run.Windsor! They are so fun and well organized. All of the people involved are encouraging. I feel so blessed to have something like this in my small(ish) hometown. Keep up the great work!

Jen C.

Makes Running Fun

Since I moved from Texas, I have struggled with finding a workout ‘family’. I am the type of person who needs the motivation to keep moving, provide accountability, and make running fun. Mandy has created a great network of people who come from all backgrounds, athletic differences, and has a plan for every body.

Kimberly H.

Highlight of My Time

Run.Windsor has been a highlight of my time in Windsor! Their tagline, Stronger Together, is so true! They share their struggles and their triumphs, and truly support and encourage each other! I am blessed to know these women!

Lisa U.

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2023 Fun Run Calendar

Stay tuned for the 2023 Fun Run Calendar!

Experience a variety of terrain, from paved trails to dirt paths in Windsor's open spaces.

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Women's Running Group

Come Run With US!

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