The Colfax Marathon is a popular annual event held in Denver, Colorado, offering a variety of race distances, including a marathon, half marathon, 5K, and relay race. The event is celebrated for its well-organized race courses, which take participants through Denver's vibrant neighborhoods, beautiful city parks, and iconic landmarks. The Colfax Marathon has grown to become a key event on the city's calendar, drawing thousands of runners from around the world to enjoy the race's festive atmosphere and the stunning views of the Rocky Mountains. Along with the race itself, the event includes a weekend of activities for runners and their families, making it a celebration of both fitness and community.
Races
Marathon
Half Marathon
10 Mile
5km
Race Date:
18 May, 2025
The Colfax Marathon, taking place on May 18, 2025, offers runners a 26.2-mile journey through the heart of Denver, featuring scenic views and unique landmarks like the Denver Zoo and Sloan’s Lake. This race is a Boston Qualifier and part of the largest marathon weekend in the Rocky Mountain region, making it a must-run for serious marathoners.
Race Date:
18 May, 2025
The Colfax Half Marathon on May 18, 2025, features a scenic 13.1-mile course through Denver, including a mile through the Denver Zoo. This race is perfect for runners looking to experience the city’s vibrant atmosphere while tackling a challenging half marathon.
Race Date:
18 May, 2025
The Colfax 10 Mile on May 18, 2025, offers a fast and fun race through Denver, perfect for those wanting to experience the marathon weekend without committing to the full distance. This race showcases some of Denver’s best urban and natural landmarks in a compact format.
Race Date:
17 May, 2025
The Colfax 5km kicks off marathon weekend on May 17, 2025, providing a quick, fun race through Denver’s City Park. This race is perfect for runners of all levels, offering a family-friendly atmosphere and a great way to get involved in the marathon festivities.
Weather based on historical averages. Route data provided by Strava, based on last year's race.
FAQs
What is the Denver Colfax Marathon?
How long is the Denver Colfax Marathon?
Where does the Denver Colfax Marathon take place?
What is the elevation gain of the Denver Colfax Marathon?
How can I prepare for the Denver Colfax Marathon?
How do I choose the right training plan for the Denver Colfax Marathon?
The Colfax Marathon, taking place on May 18, 2025, offers runners a 26.2-mile journey through the heart of Denver, featuring scenic views and unique landmarks like the Denver Zoo and Sloan’s Lake. This race is a Boston Qualifier and part of the largest marathon weekend in the Rocky Mountain region, making it a must-run for serious marathoners.
The Denver Colfax Marathon is 42km long.
The Denver Colfax Marathon takes place in Lakewood, Colorado, USA.
The Denver Colfax Marathon elevation gain is 211 metres, which Runna classifies as a Rolling race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Denver Colfax Marathon?
The Colfax Marathon, taking place on May 18, 2025, offers runners a 26.2-mile journey through the heart of Denver, featuring scenic views and unique landmarks like the Denver Zoo and Sloan’s Lake. This race is a Boston Qualifier and part of the largest marathon weekend in the Rocky Mountain region, making it a must-run for serious marathoners.
How long is the Denver Colfax Marathon?
The Denver Colfax Marathon is 42km long.
Where does the Denver Colfax Marathon take place?
The Denver Colfax Marathon takes place in Lakewood, Colorado, USA.
What is the elevation gain of the Denver Colfax Marathon?
The Denver Colfax Marathon elevation gain is 211 metres, which Runna classifies as a Rolling race.
How can I prepare for the Denver Colfax Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Denver Colfax Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Denver Colfax Half Marathon?
How long is the Denver Colfax Half Marathon?
Where does the Denver Colfax Half Marathon take place?
What is the elevation gain of the Denver Colfax Half Marathon?
How can I prepare for the Denver Colfax Half Marathon?
How do I choose the right training plan for the Denver Colfax Half Marathon?
The Colfax Half Marathon on May 18, 2025, features a scenic 13.1-mile course through Denver, including a mile through the Denver Zoo. This race is perfect for runners looking to experience the city’s vibrant atmosphere while tackling a challenging half marathon.
The Denver Colfax Half Marathon is 21km long.
The Denver Colfax Half Marathon takes place in Lakewood, Colorado, USA.
Runna classifies the Denver Colfax Half Marathon elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Denver Colfax Half Marathon?
The Colfax Half Marathon on May 18, 2025, features a scenic 13.1-mile course through Denver, including a mile through the Denver Zoo. This race is perfect for runners looking to experience the city’s vibrant atmosphere while tackling a challenging half marathon.
How long is the Denver Colfax Half Marathon?
The Denver Colfax Half Marathon is 21km long.
Where does the Denver Colfax Half Marathon take place?
The Denver Colfax Half Marathon takes place in Lakewood, Colorado, USA.
What is the elevation gain of the Denver Colfax Half Marathon?
Runna classifies the Denver Colfax Half Marathon elevation profile as Rolling.
How can I prepare for the Denver Colfax Half Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Denver Colfax Half Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Denver Colfax 10 Mile?
How long is the Denver Colfax 10 Mile?
Where does the Denver Colfax 10 Mile take place?
What is the elevation gain of the Denver Colfax 10 Mile?
How can I prepare for the Denver Colfax 10 Mile?
How do I choose the right training plan for the Denver Colfax 10 Mile?
The Colfax 10 Mile on May 18, 2025, offers a fast and fun race through Denver, perfect for those wanting to experience the marathon weekend without committing to the full distance. This race showcases some of Denver’s best urban and natural landmarks in a compact format.
The Denver Colfax 10 Mile is 16km long.
The Denver Colfax 10 Mile takes place in Lakewood, Colorado, USA.
Runna classifies the Denver Colfax 10 Mile elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Denver Colfax 10 Mile?
The Colfax 10 Mile on May 18, 2025, offers a fast and fun race through Denver, perfect for those wanting to experience the marathon weekend without committing to the full distance. This race showcases some of Denver’s best urban and natural landmarks in a compact format.
How long is the Denver Colfax 10 Mile?
The Denver Colfax 10 Mile is 16km long.
Where does the Denver Colfax 10 Mile take place?
The Denver Colfax 10 Mile takes place in Lakewood, Colorado, USA.
What is the elevation gain of the Denver Colfax 10 Mile?
Runna classifies the Denver Colfax 10 Mile elevation profile as Rolling.
How can I prepare for the Denver Colfax 10 Mile?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Denver Colfax 10 Mile?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Denver Colfax 5km?
How long is the Denver Colfax 5km?
Where does the Denver Colfax 5km take place?
What is the elevation gain of the Denver Colfax 5km?
How can I prepare for the Denver Colfax 5km?
How do I choose the right training plan for the Denver Colfax 5km?
The Colfax 5km kicks off marathon weekend on May 17, 2025, providing a quick, fun race through Denver’s City Park. This race is perfect for runners of all levels, offering a family-friendly atmosphere and a great way to get involved in the marathon festivities.
The Denver Colfax 5km is 5km long.
The Denver Colfax 5km takes place in Lakewood, Colorado, USA.
Runna classifies the Denver Colfax 5km elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Denver Colfax 5km?
The Colfax 5km kicks off marathon weekend on May 17, 2025, providing a quick, fun race through Denver’s City Park. This race is perfect for runners of all levels, offering a family-friendly atmosphere and a great way to get involved in the marathon festivities.
How long is the Denver Colfax 5km?
The Denver Colfax 5km is 5km long.
Where does the Denver Colfax 5km take place?
The Denver Colfax 5km takes place in Lakewood, Colorado, USA.
What is the elevation gain of the Denver Colfax 5km?
Runna classifies the Denver Colfax 5km elevation profile as Rolling.
How can I prepare for the Denver Colfax 5km?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Denver Colfax 5km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Major City
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Colfax Marathon or Denver Colfax Marathon. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Colfax Marathon website.
