The Boulder Rez Marathon is a popular race held annually in Boulder, Colorado, offering participants the chance to run a marathon around the picturesque Boulder Reservoir. The course features scenic views of the reservoir, the Flatirons, and the rolling foothills of the Rockies, providing a challenging yet rewarding experience for runners. The event is known for its friendly atmosphere and exceptional race organization, with aid stations and enthusiastic volunteers along the route to support participants. The Boulder Rez Marathon attracts both elite athletes and recreational runners, offering a stunning backdrop and a memorable race experience in one of Colorado’s most iconic locations. In addition to the marathon, shorter races and a relay option make it a versatile event for all levels of runners.
Races
Marathon
31km
Half Marathon
10km
Race Date:
02 August, 2025
The Boulder Rez Marathon offers runners a flat and scenic course around the Boulder Reservoir, with minimal elevation gain and stunning views of the Rocky Mountains. Scheduled for August 2, 2025, this marathon is ideal for those seeking a serene trail experience on dirt roads and paths.
Race Date:
02 August, 2025
The Boulder Rez ¾ Marathon presents a unique distance for runners seeking a challenge beyond the half marathon, featuring a flat course with minimal elevation gain around the scenic Boulder Reservoir. Taking place on August 2, 2025, this race offers participants picturesque views of the Rocky Mountains along dirt roads and trails.
Race Date:
12 April, 2025
The Boulder Rez Half Marathon features a flat, two-loop course around the Boulder Reservoir, offering runners minimal elevation gain and expansive views of the surrounding mountains. Set for April 12, 2025, this race is perfect for both novice and experienced runners seeking a scenic summer half marathon.
Race Date:
02 August, 2025
The Boulder Rez 10K offers a flat and fast course along the Boulder Reservoir, with minimal elevation gain and stunning mountain vistas. Taking place on August 2, 2025, this race is ideal for runners of all levels seeking a summer 10K on scenic dirt roads and trails.
Weather based on historical averages.
FAQs
What is the Boulder Rez Marathon?
How long is the Boulder Rez Marathon?
Where does the Boulder Rez Marathon take place?
What is the elevation gain of the Boulder Rez Marathon?
How can I prepare for the Boulder Rez Marathon?
How do I choose the right training plan for the Boulder Rez Marathon?
The Boulder Rez Marathon offers runners a flat and scenic course around the Boulder Reservoir, with minimal elevation gain and stunning views of the Rocky Mountains. Scheduled for August 2, 2025, this marathon is ideal for those seeking a serene trail experience on dirt roads and paths.
The Boulder Rez Marathon is 42km long.
The Boulder Rez Marathon takes place in Boulder, Colorado, USA.
The Boulder Rez Marathon elevation gain is 61 metres, which Runna classifies as a Flat 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 Boulder Rez Marathon?
The Boulder Rez Marathon offers runners a flat and scenic course around the Boulder Reservoir, with minimal elevation gain and stunning views of the Rocky Mountains. Scheduled for August 2, 2025, this marathon is ideal for those seeking a serene trail experience on dirt roads and paths.
How long is the Boulder Rez Marathon?
The Boulder Rez Marathon is 42km long.
Where does the Boulder Rez Marathon take place?
The Boulder Rez Marathon takes place in Boulder, Colorado, USA.
What is the elevation gain of the Boulder Rez Marathon?
The Boulder Rez Marathon elevation gain is 61 metres, which Runna classifies as a Flat race.
How can I prepare for the Boulder Rez 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 Boulder Rez 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 Boulder Rez 31km?
How long is the Boulder Rez 31km?
Where does the Boulder Rez 31km take place?
What is the elevation gain of the Boulder Rez 31km?
How can I prepare for the Boulder Rez 31km?
How do I choose the right training plan for the Boulder Rez 31km?
The Boulder Rez ¾ Marathon presents a unique distance for runners seeking a challenge beyond the half marathon, featuring a flat course with minimal elevation gain around the scenic Boulder Reservoir. Taking place on August 2, 2025, this race offers participants picturesque views of the Rocky Mountains along dirt roads and trails.
The Boulder Rez 31km is 31km long.
The Boulder Rez 31km takes place in Boulder, Colorado, USA.
Runna classifies the Boulder Rez 31km elevation profile as Flat.
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 Boulder Rez 31km?
The Boulder Rez ¾ Marathon presents a unique distance for runners seeking a challenge beyond the half marathon, featuring a flat course with minimal elevation gain around the scenic Boulder Reservoir. Taking place on August 2, 2025, this race offers participants picturesque views of the Rocky Mountains along dirt roads and trails.
How long is the Boulder Rez 31km?
The Boulder Rez 31km is 31km long.
Where does the Boulder Rez 31km take place?
The Boulder Rez 31km takes place in Boulder, Colorado, USA.
What is the elevation gain of the Boulder Rez 31km?
Runna classifies the Boulder Rez 31km elevation profile as Flat.
How can I prepare for the Boulder Rez 31km?
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 Boulder Rez 31km?
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 Boulder Rez Half Marathon?
How long is the Boulder Rez Half Marathon?
Where does the Boulder Rez Half Marathon take place?
What is the elevation gain of the Boulder Rez Half Marathon?
How can I prepare for the Boulder Rez Half Marathon?
How do I choose the right training plan for the Boulder Rez Half Marathon?
The Boulder Rez Half Marathon features a flat, two-loop course around the Boulder Reservoir, offering runners minimal elevation gain and expansive views of the surrounding mountains. Set for April 12, 2025, this race is perfect for both novice and experienced runners seeking a scenic summer half marathon.
The Boulder Rez Half Marathon is 21km long.
The Boulder Rez Half Marathon takes place in Boulder, Colorado, USA.
Runna classifies the Boulder Rez Half Marathon elevation profile as Flat.
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 Boulder Rez Half Marathon?
The Boulder Rez Half Marathon features a flat, two-loop course around the Boulder Reservoir, offering runners minimal elevation gain and expansive views of the surrounding mountains. Set for April 12, 2025, this race is perfect for both novice and experienced runners seeking a scenic summer half marathon.
How long is the Boulder Rez Half Marathon?
The Boulder Rez Half Marathon is 21km long.
Where does the Boulder Rez Half Marathon take place?
The Boulder Rez Half Marathon takes place in Boulder, Colorado, USA.
What is the elevation gain of the Boulder Rez Half Marathon?
Runna classifies the Boulder Rez Half Marathon elevation profile as Flat.
How can I prepare for the Boulder Rez 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 Boulder Rez 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 Boulder Rez 10km?
How long is the Boulder Rez 10km?
Where does the Boulder Rez 10km take place?
What is the elevation gain of the Boulder Rez 10km?
How can I prepare for the Boulder Rez 10km?
How do I choose the right training plan for the Boulder Rez 10km?
The Boulder Rez 10K offers a flat and fast course along the Boulder Reservoir, with minimal elevation gain and stunning mountain vistas. Taking place on August 2, 2025, this race is ideal for runners of all levels seeking a summer 10K on scenic dirt roads and trails.
The Boulder Rez 10km is 10km long.
The Boulder Rez 10km takes place in Boulder, Colorado, USA.
Runna classifies the Boulder Rez 10km elevation profile as Flat.
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 Boulder Rez 10km?
The Boulder Rez 10K offers a flat and fast course along the Boulder Reservoir, with minimal elevation gain and stunning mountain vistas. Taking place on August 2, 2025, this race is ideal for runners of all levels seeking a summer 10K on scenic dirt roads and trails.
How long is the Boulder Rez 10km?
The Boulder Rez 10km is 10km long.
Where does the Boulder Rez 10km take place?
The Boulder Rez 10km takes place in Boulder, Colorado, USA.
What is the elevation gain of the Boulder Rez 10km?
Runna classifies the Boulder Rez 10km elevation profile as Flat.
How can I prepare for the Boulder Rez 10km?
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 Boulder Rez 10km?
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!
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Sport:
Running
Tags:
Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Boulder Rez Marathon or BBSC Endurance Sports. 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 Boulder Rez Marathon website.
