Due to the COVID19 pandemic and the uncertainties regarding safety, we are offering the 2020 GTIS Half Marathon as a virtual only race with the Colorado Mountain Half Series. If you have already registered for the 2020 GTIS Half - please select your choice of refund/deferral or virtual by clicking here. Thank you for your patience and understanding during this time.


We hope you and your loved ones continue to remain safe and COVID19 free as Colorado, and the rest of the USA, begins to open businesses. Through this process, our team respects the need for social distancing and the successes of ‘Safer at Home’ guidance provided by health officials. While our races are outdoors, they require a significant amount of resources to make it safe for your participation. As an alternative, we considered many scenarios for postponing our races, but with current uncertainties there is too much at risk. Sadly, we are canceling the 2020 in-person GTIS Half Marathon & Colorado Mountain Half Series races. As a result, it is our hope that our community will remain protected and healthy. We wish the same for your community, too!


For the love of running, we are offering heartfelt motivation options by going virtual. We understand there is no substitution for our exceptionally scenic courses, but please consider that you’re now training for 2021. We want to stay motivated alongside you and plan to keep on running! Chin up and let’s do this!

Georgetown to Idaho Springs Half

Virtual Event: Saturday, August 8, 2020
Colorado at its Best! Run a PR at one of Colorado's oldest half marathons!
42nd Annual GTIS HALF
August 8, 2020
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For the folks who have already registered for the 2020 GTIS Half, we have some options for you to choose from.
Please select your choice of refund/deferral or virtual by clicking here. 

Here are your options:

  1. Run 2020 GTIS Half Marathon as a virtual race through the Colorado Mountain Half Series Challenge. Your $60 race fee will go toward this option - stay motivated through the summer with us and support the three non-profits who are the beneficiaries.

  2. Defer my entry to the 2021 GTIS Half Marathon.

  3. Refund my registration less the $25 cancellation fee (this fee covers race costs that our non-profit has already incurred). We appreciate your understanding.

  4. Donate my entry - proceeds benefit the Clear Creek Booster Club who are a group of parents and community members that support Clear Creek High School and Clear Creek Middle School. The main fundraising event each year is the GTIS Half Marathon, as such your registration will be applied as a tax-deductible donation to the Clear Creek Booster Club.

  5. If you DO NOT make a selection by June 5, 2020 your registration will be automatically deferred to the 2021 GTIS Half Marathon.



Three of Colorado's original and most beloved half marathons have teamed together to create the Colorado Mountain Half Series!

While we cannot be together this year for the Colorado Mountain Half Marathon Series due to the COVID-19 pandemic, we invite you to keep healthy and active with us in our three half marathon "Do the Distance" 39.3 Mile virtual challenge. You will get a virtual audio experience along with great swag and unique special Colorado Mountain Half Series Medal and shirt for the "Do the Distance 39.3." The event will benefit all three event's youth programs. Learn more at





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