Colorado Runner

09/19/2026

Every Memorial Day, over 47,000 runners, joggers, and walkers add another chapter to BOLDERBoulder history. For a select group, their performance also earns them a place among the fastest ever for their age.

Explore the history of the BOLDERBoulder race, featuring top performances and records from nearly five decades of competitive running.

09/18/2026

Colorado runners, you don’t have to travel far for an incredible fall race weekend.

The Colorado Springs Marathon presented by Toyota brings runners from all over the country to Colorado each year...but those of us who live here get this one right in our backyard :)

Marathon • Half Marathon • 5K • Kids K. Saturday, October 3rd

Register: https://www.runsignup.com/coloradospringsmarathon?aflt_token=j5OkGy1sJ1PlDuYLdh4iVB1mndLXuU5B

09/17/2026

Join us for the Ghosts and Goblins 5K & 10K
Denver’s City Park
Sunday, October 25
Runners and walkers welcome
Shirts and medals for everyone
Sign up now at https://www.coloradorunnerevents.com/halloween/

09/16/2026

Check out the shirt design for the Pumpkin Pie 5K and 10K at City Park in Denver!
Join us November 21.
Shirts, finisher's medals, pumpkin pie and other treats, free photo downloads after the race, music, fun and age group awards!
https://www.coloradorunnerevents.com/Pumpkin/

09/16/2026

I haven’t missed a day of running in 18 years! I’m afraid I’ll gain weight if I don’t run every day. I’m injured and can’t exercise. I really need to […]

I haven’t missed a day of running in 18 years!I’m afraid I’ll gain weight if I don’t run every day.I’m injured and can’t exercise. I really need to run to […]

09/15/2026

By golly, be jolly! Join us at the Ugly Sweater 5K at Denver’s Washington Park on Sunday, December 20.
Sign up at https://www.coloradorunnerevents.com/Christmas/

09/15/2026

Colorado runners lose sodium two ways at once, and most training plans only account for one of them. Thin air pushes breathing rate and sweat rate up before the body has adjusted, and the state's low humidity evaporates sweat almost as fast as it forms, so a soaked shirt can hide how much salt actually left the body.

Colorado's altitude and dry air speed up sodium loss for runners. Here is how to spot it early and what actually replaces it on a long run.

09/15/2026

Some races are just races. Others become memories you'll talk about for years.

From pine-covered hills and rugged badlands, the Monument Marathon offers a race experience unlike any other. Whether you're traveling from across the country or just down the road, we'd love to see you at the starting line.

Come see why we are Nebraska’s Most Beautiful Race by registering today at monumentmarathon.com!

09/11/2026

Why run the Colorado Springs Marathon? We can think of a few reasons...

✔️ Awesome swag ✔️ Start and finish in downtown Colorado Springs ✔️ Choose from the Marathon, Half Marathon, 5K or Kids K ✔️ Share race day with runners coming in from across the country ✔️ Be part of an event that has sold out five years running

🏃‍➡️ Race day is October 3 and the countdown is officially ON.

🙌🏼 Who’s running the Colorado Springs Marathon this year?

Register: https://www.runsignup.com/coloradospringsmarathon?aflt_token=j5OkGy1sJ1PlDuYLdh4iVB1mndLXuU5B

09/10/2026

Run in Denver!
The Ghosts and Goblins 5K & 10K on October 25 in City Park.
Shirts, medals and a chip timed course for everyone!
Sign up at: https://www.coloradorunnerevents.com/halloween/