Three Creeks Half Marathon

FULL WEBSITE AT:  http://www.racingunderground.com/threecreeks/

Welcome to Denver's Best Spring Half Marathon!

Sunday April 5, 2026 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 13th annual Three Creeks Half this April!

Darrin, Jill,and the Racing Underground Crew

Overall Winner Awards: Cash Awards in the amount of $200, $150, and $100 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 will be removed from their respective age categories.

Age Group Awards will be determined by net (aka chip) time (your time starts when you cross the start line timing mat and ends when you cross the finish line timing mat). Awards will be presented to the top-3 finishers in the following categories: 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+ as well as the top-3 overall non-binary finishers.

Course: Click Here to view the course map
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.

Seven aid stations with water and Hammer Heed will be available approximately every 2 miles. Hammer Gel will be available at miles 6.5 and 10.

On-Course Timing Points will be located at the 2.5, 6.5, and 10 mile aid stations.  Split times and finish times will post live online as runners pass those checkpoints.  Results can be viewed at https://racingunderground.racetecresults.com

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.  

Toilets will be available at the start/finish and on course at approximately 0.75 miles, 2 miles, 8.5 miles, 9 miles, and 10.5 miles.

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.

La Quinta Denver Englewood Tech Center (3.2 miles to race parking)
La Quinta Denver Tech Center (3.7 miles to race parking)
Look for hotels in the Denver Tech Center on Expedia.com

Parking:

Parking will take place 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. Cherry Creek High School will be hosting other events on race day, so please be sure to park in the South Lot Only. 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.

There is an easy 10 minute walk from parking to the race venue (please see attached PDF below).  We will have a bag-check at the start/finish line so you don't need to go back and forth to your car.  Runner parking is not available in Cherry Creek State Park. 

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 live online split times at 2.5 miles, 6.5 miles, and 10 miles. 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 (with the option to have the back engraved for free), and a quality long sleeve tech shirt, as well as a tasty post-race meal!!! Join us on the start line on April 5th!

Enter before February 1st and your entry will include a Three Creeks Half Marathon pint glass!

Registration Fees:

Half Marathon

Price including online processing fees will be shown on the registration page.  Fee includes both team members.

Through Nov. 30: $65
Dec. 1 - Dec. 31: $70
Jan. 1 - Jan. 31: $75
Feb. 1 - Feb. 28: $80
Mar. 1 - Mar. 20: $85
Mar. 21 - Apr. 4: $90
Race Day: $100
(please register online before arriving)

Half Marathon Relay is back in 2025!!!
2 Person Half Relay!  Each leg is 6.55 miles
Shuttle van to/from exchange location provided

Price including online processing fees will be shown on the registration page.
Aug. 24 - Sept. 15: $90
Sept. 16 - Dec. 31: 100
Jan. 1 - Feb. 28: 110
Mar. 1 - Mar. 31: $120
Apr. 1 - Apr. 12: $130
No Race-Day Registration for Relays

Schedule:

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

*An awards presentation will take place at 10:00am for the top-3 overall male and female finishers, all age group and nonbinary award winners who have finished, and relay team winners (male, female, and co-ed). Additional award presentations will continue throughout the morning.

Start Time and Cutoffs:

The official race start time is 8:00am. There will also be an optional early start for runners who plan to take more than 3 hours to complete the course. The early start wave is for 3 hour+ runners only. Early start runners who finish faster than 2 hours 45 minutes will be disqualified. The early start wave is designed to enhance the finish line experience for later finishers. It is not intended to get faster runners home earlier in the day.

Placing for the top-3 overall male and female runners will be determined by gun time from the 8:00am start wave. All other runners will be placed by their net time - their time will start when they cross the start mat. Early start runners will be eligible for age group awards.

Pace Groups:

Once again, we will offer pace groups led by expert pacers who will get you to your goal on time! Pace groups will have target times of: 1:40, 1:50, 2:00, 2:15, 2:30, 2:45, and 3:00. If you would like to join a pace group, simply look for the pacer with the sign corresponding to your goal time in the start corral, and line up with your group. All pace groups will start in the 8:00am wave.

2025 Race Results
2024 Race Results
2023 Race Results
2022 Race Results
2021 Race Results
2020 Race Results (virtual)
2019 Race Results
2018 Race Results
2017 Race Results
2016 Race Results
2015 Race Results