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.
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.
Weather based on historical averages.
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 personalized 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 personalized 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!
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 personalized 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 personalized 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!
Running
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.