The world-famous Eerie Erie is a Halloween themed 5k and 10k race that runs through historic downtown Erie and takes advantage of our beautiful trail system that weaves along the Coal Creek open space areas. The 10k passes by scenic Pleasant Hill Cemetery with panoramic views and where friendly spirits can’t wait to visit this year’s runners.
The Eerie Erie is an official BOLDERBoulder Qualifier event.
**Attention**
You must register by October 19 at 12:00pm in order to get a shirt.
Any registrations after that date/time will not receive a shirt
A Great Cause!
Eerie Erie is the primary fundraiser for the Optimist Club of Erie, a non-profit organization whose sole mission is to benefit the children of our community by funding youth-specific events, programs, and activities throughout the year. You can learn more about the Optimist Club of Erie at www.erieoptimists.org.
Thank you to our sponsors:
Germany Law Firm | United Power
2026 Course Routes
** You must register by October 13 at to receive a shirt. All registrations after that day/time will not include a shirt.
On-site registration: 7:30am - 9:00am
Packet pick up: 7:30am - 9:15am
10k Start: 9:30am**
5K Start: 9:50am**
*Registration fees are $5 more for on-site, race day registration
** Start times are subject to change - please check https://erieoptimists.org/eerie-erie/ for the latest information.
Oct 31, 2026
Distance — 10K
Type — Running
46 days remaining
$30.00
Oct 31, 2026
Distance — 5K
Type — Running
46 days remaining
$30.00
Oct 31, 2026
Distance — 10K
Type — Running
46 days remaining
$35.00
Oct 31, 2026
Distance — 5K
Type — Running
46 days remaining
$35.00
Oct 31, 2026
Distance — 10K
Type — Running
46 days remaining
$30.00
Oct 31, 2026
Distance — 5K
Type — Running
46 days remaining
$30.00
These values represent the 3-year monthly averages for October in Erie.
Learn more about the host city, Erie.
The Town of Erie is a home rule town located in Weld and Boulder counties, Colorado, United States. The town population was 30,038 at the 2020 United States census, a +65.64% increase since the 2010 United States census. At the 2020 census, 17,387 (58%) Erie residents lived in Weld County and 12,651 (42%) lived in Boulder County. Erie is a part of the Denver-Aurora-Greeley, CO Combined Statistical Area and the Front Range Urban Corridor. Erie is the most populous statutory town in Colorado.
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