The Triple Bypass

The Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race!

Seasoned runners and first-timers alike appreciate the excellent communication from the 13er race crew who make this event accessible for athletes of all levels.

Join us for this exceptionally scenic, looped 13.1 course which runs through gorgeous Louisville, Colorado!

We designed this course so that you can enjoy all of the spectacular views of the Flatirons that Colorado has to offer. Come see for yourself!

Groups/Teams/Families: Save $5 per person for groups of 5 or more! See our FAQ page for more questions!

Click the drop-down menu under "race info" for all race details! Any questions, please email us at info@colorado13er.com

Here's the good stuff!!

• 10 water station passes

• 5 port-a-john passes

• 9 miles of FLAT, crushed gravel

• nearby, free parking

• spectator friendly

• 13.1 finisher medal

• 10k or 5k options available

• iced towels at the finish line

• gender-specific performance tees for every registrant

• chip timed with texted results

• live, real-time results posted online

• 13.1 miles of million-dollar views AND

• the amazing sense of accomplishment you can only get from running 13.1! (or 5k or 10k!)

Waitlist Coming Soon

The Hundo (100K) or Hundito (64K) showcases the sweetest of Colorado singletrack at the beloved Buffalo Creek trail system. Finish at a gorgeous venue on private property, and you have a dreamy cross-country MTB spectacular.

How to Sign Up

There are three ways to secure your spot:

• Enter the Lottery – Your card will be automatically charged if you are selected on March 10. No charge if not.

• Fundraise for Our Beneficiaries – Snag one of our 75 fundraiser entries and earn guaranteed entry while supporting a great cause

• Volunteer – Support the Session Series or Hundo pre-race and bypass the lottery (limited to 40)

If you enter the lottery, you will have the option to create or join a Lottery Group. This ensures you won’t be separated from friends or family when selections are made. Please note: Lottery Groups are separate from race teams. Official race teams can be created after lottery selections are complete.

The Hundo proudly supports:

• Colorado High School Cycling League

• COMBA

• Lucky Bikes

Even if you choose not to fundraise, add a little during the registration and give to the cause of kids, trails, and bikes - aces.

For full details on the lottery process, team entries, and selection timeline, please review our Lottery FAQs

E-Bikes are not allowed in the Hundo

Run for the Eagles!

Support the Heritage Eagles Cross Country Team at the 8th Annual Heritage Eagles 5K!

Last year’s event raised over $3,500 for the team, and with $10 from each registration going directly to the cross country program, every step you take makes a difference.

Post-Race Pancake Breakfast

Celebrate your finish with a delicious pancake breakfast from Flippin’ Flap Jacks—complete with sausage and refreshing orange juice—free for all registered participants.

A Legendary Course

Race on the famed Liberty Bell course, a Colorado high school cross-country tradition for over 45 years. This fast, scenic route blends neighborhood streets with smooth crushed gravel paths along the High Line Canal—perfect for a PR!

📅 Race Day: Saturday, July 18

⏰ Start Time: 8:00 AM

📍 Heritage High School – 1401 W Geddes Ave, Littleton, CO 80120

T-Shirts

Add a race T-shirt for $14 when you register.

Order by June 29 to guarantee yours.

Fitted style—size up for a looser fit.

Awards & Medals

Top 3 in each age group receives a custom 3.5” die-cast medal with a unique lanyard.

Additional awards for:

🏆 Male Overall Winner

🏆 Female Overall Winner

Age Group Awards – Top 3 in Each:

10 & Under – Boys/Girls

11–12 – Boys/Girls

13–14 – Boys/Girls

15–19 – Boys/Girls

20–29 – Male/Female

30–39 – Male/Female

40–49 – Male/Female

50–59 – Male/Female

60–69 – Male/Female

70+ – Male/Female

That’s 62 total medals awarded on race day!

Race Day Details

Registration: $40 (race day registration available)

Packet Pickup:

Friday, July 17th – 8:30 AM to 10:30 AM at Heritage High School

Race Day – Opens at 7:00 AM

Parking: Available in the Heritage High School parking lot.

Course Info

🏃 Course Type: Liberty Bell out-and-back

📈 Elevation Gain: 72 ft

📉 Elevation Loss: 128 ft

⬇️ Min Elevation: 5,434 ft

⬆️ Max Elevation: 5,521 ft

The Splash Mash Dash Kids Triathlon is perfect for kiddos looking for a way to "TRI" the sport of triathlon or tune up their skills for a larger race. The race will offer kids a safe and fun environment for racing.

To encourage participation and enjoyment for all, The Splash Mash Dash Kids Triathlon is a non-timed event. However, we do have awesome finisher medals that look just like the medals they've seen parents collect over the years! We encourage every child to do their best and practice racing in a supportive environment. We encourage parents to manually time their child if they are interested in a time for their race.