Loading ... ... Please wait!

Karen Hornbostel Memorial Time Trial Series
at Cherry Creek State Park

See you next year!


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 March 29th.

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, and Bicycle Colorado.

Karen Hormbostel was 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. 

Bicycle Colorado envisions a Colorado where riding a bicycle is always safe and convenient for everyone, where bicycling is the top choice for recreation and everyday trips, and where the benefits of bicycling are experienced and valued by all people in our state.

The COBRAS and the KHMTT are proud to be able to contribute to these worthwhile organizations.

Photos by Ryan Muncy


What is new this year

  • USAC has eliminated the gearing requirement for juniors, no roll outs
  • Due to the agreement between USAC and Bicycle Colorado there is no longer a local association membership fee

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

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.

What’s New

The Roads Have Been Resurfaced!

The park has resurfaced all of Tower Loop and a major section of East Lake View Road, up to where the park resurfaced the road on the west side a few years ago which will make racing at Cherry Creek State Park much easier on the body and faster! (See map).

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.


Course Change

The section of the roadways that was not repaved is the Lake Loop (the loop at the west end of the course) which has cracks that are two to three inches wide and are dangerous for bicycle racing.

Because of this, the course has been modified to bypass the Lake Loop and riders will now proceed a little further on the main road and do a turnaround. (See the new course map here).

There will be flaggers before and after the turnaround point to control vehicle traffic. We will position marshals before the turnaround point to remind riders to slow down, and a marshal at the turnaround point to help you know where to turn.

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.

Learn More

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