run.Windsor, Stronger Together

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

run_windsor_race_series (2).png


Professionally timed endurance events including 5k, 10k, Half Marathon, Full Marathon and Ultra Marathon.


Run Club, free group 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 Race Series

Logo (5).png

Speaker Series

Friday, June 21st

Keynote Speaker 6pm: Matt Scoletti

Topic: Maxing out your Running Mindset

​Today, Matt's greatest fulfillment comes from sharing the strategies that propelled him to sobriety, health, and boundless positivity.

Get Tickets

run.Windsor Fun Run Logos.png

Free Fun Runs

5k on a Tuesday at Ridgehill Tavern benefitting Windsor Gives ,Tuesday, June 11th 5:30 pm

5k Fun Run at Ridgehill Tavern benefiting Windsor Gives, Thursday June 20th 6:00 pm

run.Windsor Community



  • Date: June 22, 2024
  • Time: 7:00 am
  • Location: Raindance National Golf Course - Grainhouse
  • 5k, 10k, Half Marathon,
  • 12 Hour Last Man Standing
  • & Kids Fun Run

Walk, run or ruck, a 5k, 10k, Half Marathon or 12 Hour Last Man Standing Race to celebrate the Red, White and Brew in Windsor, CO!

Sauna, Cold Plunges, Live music, food, drinks, bouncy houses, face painting and more! Finishers will receive this year's RWB Boco Performance Hat and a chance at top finisher prizes.


logo_greeley freedom 5k (1).png

Greeley Freedom 5k

It's Back!

  • Date: July 4, 2024
  • Time: 7:00 am
  • Location: Downtown Greeley, Colorado

Run or walk the traditional Greeley 5k, along the Greeley Stampede Fourth of July Parade Route, before the parade begins on July 4th, 2024

Proceeds benefit Beef Sticks for Backbacks



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.


SWAG (4).png

Severance Days 5k

  • Date: August 24, 2024
  • Time: 8:00 AM
  • Location: Severance Community Park

Welcome to Severance's 3rd Annual Severance Days 5K run/walk and Kids Fun Run.

Severance Days 5K looks to tie the bow on an amazing weekend for an amazing community. The race is professionally timed with chipped race bib and a finisher hat or Goodr sunglasses!

Register Today


Flaming Foliage Relay

11th Annual Flaming Foliage Relay

Friday September 6, 2024 - Saturday September 7, 2024

Flaming Foliage is a 165 mile 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


windsor marathon.png

Windsor Marathon

  • Date: October 6, 2024
  • 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 breakfast, drinks, music, kids zone and more!

There's a distance for everyone with a kids fun run, 5k, 10k, half and full marathon.



Turkey Trot

  • Date: November 28, 2024
  • 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!


Santa catch.png

Santa Catch Race

  • Date: December 14, 2024
  • Time: 9 am
  • Location: Power To Play, Windsor CO

5k - 10k Run/Walk, 1 Mile 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 1 mile 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!


Logo (2).png


  • Date: March 16, 2024
  • 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 Peculier Ales, 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.


logo_great western trail race (1).png

Great Western Trail Race

  • Date: April 20, 2024
  • Time: 8:00 AM
  • Location: Severance Community Park
  • 5K - 10K - Half Marathon

Run or walk as we celebrate the opening of Northern Colorado's newest trail, connecting Windsor, Severance and Eaton!

Choose a 5k, 10k or Half Marathon - with the inaugural Great Western Trail Race finisher shirt, live music and custom locally made prizes for top finishers.

Register Today

weld your mettle ultra_running events.jpg


  • Date: May 25 - 26, 2024
  • Time: Varies by distance
  • Location: Eaton, CO
  • 7k Run or Ruck,
  • 3, 6, 9, 12 or 24 Hour 4 Mile Loop Races
  • Solo or Relay

Run or ruck a 7k, or a 4 Mile loop course as an individual or a relay team, while enjoying Sauna and Cold Plunges. This rugged event will be held on a groomed dirt course in Eaton, CO on private land where camping is available, as well as food 24/7 in a heated barn, food trucks, coffee, live music and more.

Participants will receive a quality technical shirt, finisher medal, chip timing and a custom WYM Bib/Medal holder, that you'll brand with your name once you finish your distance - because you've Welded Your Mettle!


Join the run.Windsor RUN GROUP

Receive a 20% discount on run.Windsor Events, training shirt, perks from our run group partners, exclusive invites to group runs + motivational speaking events and more!

Join Today!


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. Click here to hear our story

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.

Click here to hear our story

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.

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

Come Run With US!

Windsor Marathon 2021-0460.jpg
Windsor Marathon 2021-9500.jpg
Red White and Brew Race-123.jpg
Red White and Brew Race-92.jpg
Lucky Brew Race-0062.jpg
Lucky Brew Race-0274.jpg
Santa Catch 2021  1L0A7272.jpg
Santa Catch 2021  1L0A6993.jpg
Windsor Half Marathon-2158.jpg
Windsor Half Marathon-1663.jpg