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Welcome to Denver's Best Spring Half Marathon!

Saturday April 3, 2021 at Cherry Creek State Park

Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a half marathon course that is flat, fast and scenic!

Travel on foot through some of the most beautiful parts of Cherry Creek State Park, with a total combined elevation gain of only 291 feet spread out over 13.1 miles as the course follows the banks of Cherry Creek, Windmill Creek, and Cottonwood Creek on a mix of road, paved running trail, and wide dirt trails.

We hope to see you at the 7th annual Three Creeks Half this April!

Darrin, Jill,and the Racing Underground Crew

COVID-19 Protocols Though it appears COVID is on the wane in Colorado, there is still the need to follow precautions at a group event. The following is a list of precautions that we will be taking at the 2021 Three Creeks Half Marathon. We ask that you comply with these rules so that we are able to continue hosting in-person races in Colorado.

START, FINISH, AND PARKING LOCATION: Parking is now being allowed at Cherry Creek High School, and we have rented the school's south lot for race parking. Participants may park in the south lot ONLY on race morning. No racer parking will be allowed inside the park or in any of the other high school parking lots. The SOUTH LOT is located off Yosemite street, a half mile north of Bellevue.

From I-25, take exit 199 (the Bellevue exit), then turn east on Bellevue. Drive one mile east on Bellevue, then turn left onto Yosemite. In approximately 0.5 miles you will turn right onto Campus Drive and follow signs to race parking.

This also means the start and finish will return to their original location in the Hobie Hill Group Area near the Marina on the west side of the park, and we will be able to use the original Three Creeks Half Marathon Course!

Start & Finish will use the same line. Starts will be in waves of 25 or fewer runners with a gap of 3 minutes between waves. The start area will be limited to the wave in the start corral, and the two waves that immediately follow the current start wave. There will be separate waiting areas for the two groups waiting to enter the start corral. All other runners will need to be out warming up for the race, or waiting in a socially distanced manner away from the start line.

Wave Starts are required to meet state and county guidelines on group size. We will have 12 waves to choose from, with a maximum of 25 runners allowed per wave. Waves are grouped by running speed to avoid mingling on the course and to streamline the awards process. Please sign up for the correct wave for your running speed. You will select your wave during registration. Runner speed range will be shown during registration. If you run significantly faster than your chosen wave range, then you may be omitted from the awards list. We will provide you with an FM station to listen to from your vehicle so you can hear race announcements regarding wave starts.

Please, no strollers or dogs this year.

Results will be updated online every two minutes throughout the day! Results will not be posted on-site to avoid groups forming around the results board.

Spectators will not be allowed at the race unless they remain in the car. Spectators in the start or finish areas will be asked to return to their cars. Our permits do not allow anyone except registered runners and race staff to be present at the event. We understand you would like your friends and family to cheer you in, but this will lead to the cancellation of all events in the park. We encourage your fans to watch for your results online (they update every 2 minutes) and congratulate you with dozens of text messages. Setting up a group text prior to the race is a great way to engage your fans. Be sure to include the results link in your first text to the group. You can celebrate with them in person when you get home.

Masks must be worn at all times when not racing. You will be allowed to remove your mask 30 seconds before your start and you will not be required to wear a mask while racing. You will put your mask back on as you exit the finish chute.

Post Race will not be as festive as usual, but we will have food and drinks for you as you exit the finish area, along with music and a finish line announcer. Awards will be distributed at the awards tent on a rolling basis. If you are an award winner, your award should be confirmed and ready for pickup within about 20 minutes of finishing. You can check the results on your phone to confirm your award eligibility. Again, please be sure to select your start wave according to your expected finish time. Runners who enter a slower wave and run significantly faster than the range for their wave may be omitted from awards.


Schedule

  • 6:15am - Packet Pickup & Race Day Registration Opens
  • 7:15am - Early Start Wave for Runners Running 3+ hours
  • 7:45am - Official First-Wave Start Time
  • 8:15am - Final Wave Start
  • 10:00am - Awards Presentation*
  • 11:30am - Finish Line Closes

General Info
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Registration
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Registration & Packet Pickup

Your entry into the Three Creeks Half includes a spot on the start line of Denver's most scenic spring half marathon, fast and accurate chip timing with on-course split times (locations coming soon). Results will be posted live to the web, with athlete tracking for your fans! Printable finisher certificates & personal finish line videos (weather permitting) will be available shortly after the event, along with FREE downloads of your race photos. You will also earn a beautiful finisher medal and a quality long sleeve tech shirt, as well as a tasty post-race meal!!! Join us on the start line on April 3rd!

Register Online

Entry Fees

  • Through March 25th: $70
  • March 26 - April 2 (noon): $75

REFUND POLICY: We will make all efforts to hold the race, regardless of weather conditions, however we reserve the right to alter or shorten the course, or cancel the event in the case of extreme weather. We also acknowledge that changes in COVID restrictions may force the cancellation of the event. Once accepted, refunds of entry fees will not be issued for any reason. Entries cannot be transferred or deferred. If the race is cancelled, all in-person entrants will be moved into the virtual category (shirts & medals will be mailed) and will receive a $20 credit which they may use for any Racing Underground owned event through 2022. If the event capacity is reduced due to a change in COVID level or ruling, all in-person entrants will be selected in the order they registered. All later entrants will be moved into the virtual category (shirts & medals will be mailed) and will receive a $20 credit which they may use for any Racing Underground owned event through 2022.

Packet Pickup: We will have early packet pickup and race day packet pickup options in 2021.
  • Early Packet Pickup will be held at Runners Roost Lakewood on Thursday April 1st from noon until 6:30pm.
  • Race Day Packet Pickup will take place in the start/finish area at Hobie Hill starting at 6:00am. There will be a bag check located near the registration tent and the start/finish line. This will save you the need to walk back and forth to your car.

Awards: Cash Awards in the amount of $100, $75, and $50 will be presented to the top-3 overall male and female finishers. Top-3 overall will be determined by the gun time - the first three men and women to cross the finish line will win the prize money. Overall prize money winners must start in Wave-1 (men) at 7:45am or Wave-2 (women) at 7:48am.

Age Group awards for ages 19 & under, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70-74, 75-79, and 80+ will be awarded by net (aka chip) time.

General Info
Schedule, etc.

Registration
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Results & FAQs
Located in Left Sidebar

Course Description
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Directions
Volunteer, Contact Us

Course Description

Start Time and Cutoffs: The race will start with a dozen waves beginning with the 3 hour+ runners at 7:15am. Men's sub-1:30 runners start at 7:45, women's sub-1:45 runners at 7:48, followed by 10 waves of mixed-gender waves every three minutes based on estimated finish time. You will select your wave during registration.

Placing for the top-3 overall will be determined by gun time from wave-1 or wave-2. All top-3 runners must start in wave-1 (men) or wave-2 (women) to be eligible for the prize money. All other runners will be placed by their net time - their time will start when they cross the start mat. Please arrive on time for your wave. If you miss your wave start, you will not be able to run.

Course: Click Here to view the course map
GREAT NEWS!!! We have received the OK from Cherry Creek High School to use their south lot for parking, which means the race will start and finish in the Hobie Hill group area near the Marina on the west side of the park. Once again, however, the course has been changed. This time due to construction near mile-3. The course is now finalized and the map has been updated.

The course follows an equal mix of wide and smooth dirt running trails, winding paved running paths, and paved roads through the most scenic sections of Cherry Creek State Park.

Six aid stations with water and Skratch will be available approximately every 2 miles. Gels will be available at miles 6.2 and 10.

The course is as flat as it is scenic, with a total elevation gain of just 291 feet spread out over the 13.1 mile course. You will follow the banks of Cherry Creek, Windmill Creek, and Cottonwood Creek. Aid stations will be COVID-safe and are currently planned to be at 6 locations on the course. Carrying your own fluids is recommended. You may refill your bottle or hydration pack at the aid stations.

Toilets will be available at the start/finish and on course. On-course locations will be updated prior to race day.

General Info
Schedule, etc.

Registration
Packet Pickup & Awards

Results & FAQs
Located in Left Sidebar

Course Description
Details & Maps

Directions
Volunteer, Contact Us

DIRECTIONS and LODGING

Directions: Parking is now being allowed at Cherry Creek High School, and we have rented the school's south lot for race parking. Participants may park in the south lot ONLY on race morning. No racer parking will be allowed inside the park or in any of the other high school parking lots. The SOUTH LOT is located off Yosemite street, a half mile north of Bellevue.

From I-25, take exit 199 (the Bellevue exit), then turn east on Bellevue. Drive one mile east on Bellevue, then turn left onto Yosemite. In approximately 0.5 miles you will turn right onto Campus Drive and follow signs to race parking.

Bag-Check: There will be a bag check located near the registration tent and the start/finish line. This will save you the need to walk back and forth to your car.

Lodging: Here is some suggested lodging near Cherry Creek State Park.

CONTACT US

Most questions are answered right here on the race website. If you can't find the answer here, please feel free to email or call us!

Email: to info@racingunderground.com

Phone: 303.642.7917 (this is a home phone - Call between 8am and 8pm only, please!)

Volunteering: If you would like to volunteer for a race, we would love to talk with you! Just send an email to info@racingunderground.com and Jill will get right back with you.

Other Great Events: Check out our website at www.RacingUnderground.com to learn about our other exciting running and multisport events!

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