Saturday, Oct 7, 2023 @ 8:00 AM

Dirt Circus - Boulder

Runners Roost Boulder

Boulder, CO Community Run

This Event Took Place Sat. Oct 7, 2023

August 10, 2024

Come Run, Come All to Dirt Circus Boulder!

The Dirt Circus is coming to Boulder, Colorado. Dirt Circus is a series of free community events organized by UltraSignup to celebrate local races, and race directors. We are bringing together the local running community to share everything we love about trail running. The one-day festival will highlight local races, run clubs, brands, and other local businesses. The event includes a social run, food, a raffle with tons of prizes, camaraderie, and so much more. Come and join us under the big top.

For information on Dirt Circus events in other cities check out!

Local Store Partner: Runners Roost Boulder

In Partnership With:
This event is possible because of the local partnership of Runners Roost in Boulder. Stop on in for all the running shoes, apparel, and other gear you could need.

Expo Partners & Sponsors

Dirt Circus is a party to bring together the whole running community, not just runners, but also race companies, coaches, nutritionists, and running brands. See below for some of the partners who will join us in Boulder!

Race Companies, Local Partners & Brands

Gnar Runners
Aravaipa Running

Event Details

Schedule, August 10, 2024

8:30am - Group Run Check-in at Runners Roost Boulder.
Give yourself time to mingle, talk to brands, demo shoes, and get ready to run!

9:00am - Group Run Starts
Enjoy a casual run with friends from the local run community. Options for a 5K route or a longer distance. The group will break up to ensure we don't overrun the trails and that all running paces are accommodated.

10:30am - 11:00am - Return from Group Run, Mingle - Enter Raffles by 11:00!

11:00am - 1:00pm - Brand Expo, Social Connections
We'll have brand booths and tables set up around Runners Roost.

11:30: Food is available at nearby at the Southern Sun Brewery.
12:30: Raffle Prizes drawn

Raffles & Giveaways!

  • UltraSignup apparel & swag
  • More from the brands on site!
  • All attendees will receive an exclusive discount to Runners Roost.

All those registered will be entered for a chance to be one of three UltraSignup merch winners!

PreOrder the Original Dirt Circus T-Shirt specific to each city. City-specific shirts are only available for purchase during registration. These shirt sales close on Sunday July 21, 2024. We'll have more options for Dirt Circus and UltraSignup swag to purchase on site.

Other swag available in person from our partners in prizes, raffles and for purchase!


UltraSignup Store

Shop UltraSignup gear and apparel in the UltraSignup Store.

Origin Story

In 2020, UltraSignup sold to new owners, a group of runners who were amazed by how the trail running community rallied to support one another through the pandemic. They had an idea to celebrate trail running in a whole new way in late 2021, organized the first Trail Party. The response was incredible. The community was hungry to connect, to gather, to celebrate all things trail running. And so in 2023, we took all that enthusiasm and dreamed up the Dirt Circus.

Why a Circus? Once upon a time, ultrarunning looked a little different. The sport has its roots in pedestrianism, where people would gather under the big top and walk and run for sport. Bets were made, the limits were pushed, and popularity soared. So come entertain yourselves with us, under the metaphorical big top.

Event's current local time: 1:04 PM MT


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