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Start Fall with a great, fun run!

All-Out Fall Fest

Saturday, September 13, 7a

Church Ranch Office Park, Westminster, CO

Register for all 3 and save!

Half Marathon

$85.80 incl. $5.80 Fee 7:00AM MDT - 11:00AM MDT Registration ends September 13, 2025 at 6:50am MDT

10K

$64.60 incl. $4.60 Fee 7:30AM MDT - 11:00AM MDT Registration ends September 13, 2025 at 7:20am MDT

5K

$54 incl. $4 Fee 7:40AM MDT - 11:00AM MDT Registration ends September 13, 2025 at 7:30am MDT

Volunteers needed!

We need more volunteers for course! Give us a few hours of your morning to receive enough credits for a free half marathon or a $50 donation to our benefiting charity, #themarshalleffect 

Let's get ready!

It's time to get ready for Fall Fest! Athlete detail emails were sent to everyone registered as of Monday, Sept 9, 9a. If you didn't get your email, check your spam folder and don't worry, find the Athlete Details page in the menu above. Not yet registered? Join us!

Join us for the 11th Annual Fall Fest, where one of Colorado's favorite trails meets one of its most glorious parks, all in support of #themarshalleffect! Follow the winding courses southwest along Big Dry Creek Trail, and enjoy the breathtaking sight of Standley Lake against the backdrop of the majestic Flatirons. Its Endless Series sidekick is Beat the Heat. Kick off your fall season with this event embracing 70s nostalgia and flower power!

Location

An official BOLDERBoulder qualifying event!

We are thrilled to announce that Fall Fest has been designated as an official BOLDERBoulder Qualifier event! You can use your finishing time from any distance of this race to qualify for one of the 2026 BOLDERBoulder's qualified waves. For more details on the BB10K qualifying waves, please visit this link.

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Benefiting Charity

Established in memory of Ryan Mark Marshall who took his life on December 29, 2018, #themarshalleffect works to promote awareness and provide support for youth and young adults at risk of self-harm or suicide. Please consider a donation today, 100% of which will go to financially support Evidence Based Treatment.

Even the smallest act of kindness can change someone's day, and perhaps their will to keep going.

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