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Karen Hornbostel Memorial Time Trial
at Cherry Creek State Park

2023 Dates:

March 29,
April 5, 12, 19, 26,
May 3, 10
Weather Make-up:
May 17


Since 1991, the KHMTT has taken place on Wednesday evenings in Cherry Creek State Park in early spring.

The seven-week series will be starting TBD.

The weather is a bit unpredictable (this is Colorado!), but that is what makes the KHMTT unique and challenging!

The course begins at the edge of the Cherry Creek Reservoir, winds through the wetlands southeast of the reservoir, and crosses back and forth the small creeks that supply the water for the reservoir.

The KHMTT series is a fundraiser for Cancer Fitness Institute in memory of Karen Hornbostel, a four-time masters national road champion who battled metastatic breast cancer for over 13 years yet courageously pioneered a fitness program for cancer patients that started what is today the Cancer Fitness Institute.  Her work is still making a difference today in the quality of the lives of thousands of cancer survivors. The COBRAS and the KHMTT are proud to be able to contribute to this worthwhile program.

The Karen Hornbostel Memorial Time Trial Series is presented by the COBRAS.

Photos by Ryan Muncy

What’s New

Like to race for free?

The KHMTT holds a safety record second to none in large part because of our many volunteers and supporters assisting racers, monitoring motor vehicles and directing traffic. Be a vital part the time trial series by being a volunteer and you can work and race the same night!

Learn More

View the Course

Course Change

The course is now 9.6 miles! The course will finish with a long straight uphill climb the last mile before finish followed by a tight right-hand turn, then a quick downhill to the line. This change will allow our timers to stay in a vehicle (not under a tent) and they will be facing away from the sun. To check out the changes, go to What You Need to Know, The Details, The Course.

New! E-bike Categories

The KHMTT is introducing four new e-bike categories. The new categories are Men 19-39, Men 40+, Women 19-39 and Women 40+.

E-bikes may be Class 1 only and must adhere to the following:

  • No throttle
  • Freely operable pedaling system: rear wheel drive train of pedals, crank, chain, and gear system.
  • 750 watt or less motor (manufacturer’s label of compliance is the minimum standard)
  • Motor engages only with pedaling
  • Motor assistance cut off at 20 mph (32 kmh)
  • A single battery
  • Limited start assist (no pedaling) up to 4 mph (6 kmh)

The e-bike should have a label on the frame indicating it is a class 1 e-bike showing the max wattage and speed (example: 350w 20 MPH) or the racer must be able to verify to the Chief Referee that the bike does conform to the above requirements. The Chief Referee will make the final decision on e-bike qualifications.

New Route to the Parking Area

Because of the extension of the course onto Swim Beach Access Road, vehicles entering the park going to the Smoky Hill Parking area are requested to use the East Boat Access Road (the road where the start line is located) to Swim Beach Access Road, then turn left to the Smoky Hill parking area.  That will prevent vehicles from driving on the actual course as racers approach the finish line.  To see the new vehicle route, go to What You Need to Know,  The Details, The Course.

Never raced before and would like to try it?

Racing in a time trial is fun and one of the safest ways to race a road bike. You can race one night in the KHMTT for only $20 and we will help you get started.

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Show and Go!

“Show and Go” allows you to reserve a start time for the remainder of the series, then on nights you want to race, just show up at the start line and go! 

How it works:

  • You register for Show and Go
  • Select your start time
  • Pay the $20 ($24 for two races per night) start time reserve fee via credit card
  • The first night you race, come by the registration table and pick up your bib.
  • Go to the start line and race!
  • When you want to race again, just show up at the start line and race!

Learn More

Addition of a Corridor in the Tower Loop Turn

The Tower Loop turn has always been problematic, as parked vehicles cannot always see racers entering the loop when backing out of a parking space.  This year we have added a corridor, separating racers from other vehicles in the loop. Racers will merge left as they enter the turn and stay left of the cones in the turn. When exiting the corridor, racers will merge right as they exit the loop back onto the main road.


Stay Up To Date With The Latest Updates and Series Info

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