Colorado Triathlete

Boulder Sunset Triathlon
2023-08-26 | Boulder Reservoir, 5275 Reservoir Road, Boulder, CO, 80301, United States
Join us for an unforgettable morning at the Boulder Reservoir. Although this race does not take place at sunset, it will take place at the end of the summer– it’s sister race is the Boulder Sunrise in June. Experience gorgeous views at the recently upgraded venue. All participants receive stellar race shirts and finisher medals, too. This race is a favorite for beginners due to the flat bike course and a packed dirt trail run course.

IRONMAN World Championship - Men's Race
2023-09-10 | Nice, France, Nice, France
The very best will embark on a 140.6-mile journey that presents the ultimate test of body, mind and spirit. Through decades of stellar athlete performances, inspirational participants and emotional memories, the IRONMAN World Championship has etched a reputation as the pinnacle of the triathlon landscape and an iconic global sporting event.

Harvest Moon Long Course Triathlon
2023-09-16 | Boulder Reservoir, 5275 Reservoir Road, Boulder, CO, 80301, United States
The Harvest Moon Triathlon the 23rd edition of this event takes place at the beautiful Boulder Reservoir on September 10th, 2022. Est. in 2000 this Colorado classic provides the veterans to beginners a challenging, affordable, and competitive race with a local flavor. Whether this is your final event of the season, or a tune-up for a fall long course triathlon, don’t miss the Harvest Moon! The Aquabike portion is one of the fastest growing Aquabikes in the nation, while the duathlon is Colorado’s only long-course duathlon.

Run the Rockies Road 10K & Half Marathon
2023-09-16 | Frisco, Frisco, CO, United States
The Run the Rockies Road 10k and Half Marathon will feature the traditional Run the Rockies Road Race course with runners starting near Copper Mountain; runners will follow the paved recreation path through the Ten Mile Canyon. The 10k course is 100% downhill and the half marathon course is 75% downhill. This course will showcase the beautiful fall colors in Frisco!

Last Call Triathlon
2023-09-23 | Boyd Lake State Park (Loveland), 3720 N County Road 11-C, Loveland, CO, 80538, United States
Yes! I want ONE MORE adventure!! Escape to the lake! The Last Call Triathlon will be an event you’ll look forward to all season long. Why? Beautiful mountain views, great weather and a family fun venue! Did we mention camping? Yup! There’s that too. Sitting on the east side of Loveland and southeast of Fort Collins, this close-to-home race day will have a family feel that’s intimate, fun and uniquely challenging. The course layouts make race morning packed with spectator cheering and multiple athlete flybys. With ON-SITE camping options, make a weekend out of this event and plan some extra relaxation time.

Oktoberfest Sprint Triathlon
2023-09-24 | Union Reservoir (Longmont), 461 County Road 26, 80504, United States
The Oktoberfest Sprint Triathlon features a half mile lake swim, a flat and fast single loop 12.9 mile bike, and finishes with a 3.1 mile run on a gravel road that hugs the lake. Please see course maps for a full description. Overall this is a beginner friendly course, and sets up very well for family and friends to spectate right alongside the action. The best part of Union Reservoir is how close the transition area, start line, finish line, expo area, and parking are to each other!

IRONMAN World Championship - Women's Race
2023-10-14 | Kailua-Kona, Hawaii, Kailua-Kona, HI, 96740, United States

Chilly Cheeks Duathlon Series
2023-12-16, 2024-01-13, 2024-02-24 | Hobie Park, 4800 S. Dayton St., Greenwood Village, CO, 80111, United States
Denver’s low key, low cost multisport winter series!!!
The Chilly Cheeks Winter Series is composed of three fun run-bike events at the Cherry Creek Reservoir. We provide a marked and marshaled course, fast & accurate chip timing, light refreshments, and some fun mid-winter competition in the heart of Denver.
When you enter the three race Duathlon Series or Run Series Option by December 17th you will get a pair of Chilly Cheeks Sweat Pants included with your entry! These are perfect for pulling on post-race or for lounging around the house.

Yeti Chase 5K & 10K
2024-01-28 | Bear Creek Lake Park (Lakewood), 15600 W. Morrison Road, Lakewood, CO, 80228, United States
The Yeti Chase 5K & 10K take place at beautiful Bear Creek Lake Park in Lakewood. This is the 13th year for the Yeti Chase, and it has sold out well before race day in all previous years.
After chasing down the Yeti, runners wander the park’s 2,500 acres, known for it’s diverse bird and waterfowl population as well as stunning views of the foothills. Quality Long Sleeve gender-specific technical running shirts, hot cocoa, and a personal video of your race finish!
Get your photo taken with the Summit Cove Yeti and you could win a free summer stay at one of the beautiful Summit Cove properties in Keystone!

Frisco Gold Rush
2024-02-10 | Frisco Nordic Center, 616 Recreation Way, Frisco, CO, United States
The Annual Frisco Gold Rush is the longest running Nordic event in Colorado, and consists of classic and skate races open to skiers of all ages and abilities. Gold Rush is where the past and present come together to celebrate our historical mining heritage and embrace our snowy Nordic culture.
KIDS 1K FUN SKI
5K SKATE SKI
10K SKATE OR CLASSIC
20K SKATE SKI

Audi Power of Four Ski Mountaineering
2024-02-10 | Aspen Snowmass, Aspen-Snowmass, CO, United States
The Audi Power of Four Race Series is a premier endurance race series utilizing the unique and amazing terrain of each of the four Aspen Snowmass mountains. Each race is designed to test the limits and skills of both elite and recreational athletes.

Mt. Taylor Winter Quadrathlon
2024-02-17 | CO

Frisco Freeze Fat Bike Race
2024-02-17 | Frisco Nordic Center, 616 Recreation Way, Frisco, CO, United States
Join us for the Annual Frisco Freeze Fat Bike Race at the Frisco Nordic Center. This is your one chance this winter to ride your fat bike on the Frisco Nordic trails and the Frisco Freeze is back in 2022 with an all new course! This fun course showcases amazing views of Buffalo Mountain and the Ten Mile Range.

Ralston Creek Half-Marathon & 5K
2024-02-18 | Arvada, Arvada, CO, United States
The Ralston Creek Half-Marathon & 5K has become Colorado’s premier winter half marathon!
Finisher Medals for Half Marathon finishers and a generous 4:30 cutoff time.
Courses follow a scenic mix of road and bike path through Arvada’s beautiful west side. Long-Sleeve Gender-Specific Tech Shirts, hot cocoa, breakfast burritos from El Senor Sol Mexican restaurant, and free race photos.

Barkin' Dog Duathlon
2024-04-21 | Cherry Creek State Park, 4201 South Parker Road, Aurora, CO, 80014, United States
Participants can choose from the standard 5K Run, 34K Bike, 5K Run event or the short course which challenges participants with a 1.2 Mile Run, 11 Mile Bike, 5K Run.

NOCO Half Marathon & 10K
2024-04-27 | Boyd Lake State Park (Loveland), 3720 N County Road 11-C, Loveland, CO, 80538, United States
Spring is the season of renewal and running. We hope you join us for a fun adventure that embodies the spirit of springtime at the beautiful Boyd Lake State Park!
Choose from the Half Marathon (13.1 mile) or 10K (6.2 mile) for your run adventure. This course is on smooth paved walkways with about three quarters of a mile being off road. Beautiful lake and wildlife views and fun post race festivities. Did we mention almost no elevation gain? This is one flat course making sure you’ll set a new PR or enjoy a fun steady-paced morning run race

Ordinary Mortals Triathlon
2024-05-19 | Pueblo, 2200 Bonforte Blvd, Pueblo, CO, 81001, United States
Ordinary Mortals Triathlon (OMT) is a reverse order sprint distance (5 km run, 12.5-mile bike, 300-yard pool swim) triathlon for all us “Ordinary Mortals” – from the first time triathlete to more competitive triathletes on a fun and challenging course.
Bring the kids for the youth triathlon, Mini Mortals Triathlon, after the adult race. This is a family friendly event often attracting several families of two or three generations racing together the same day!

Stroke & Stride
2024-05-30, 2024-06-05, 2024-06-13, 2024-06-20, 2024-06-27, 2024-07-11 | Boulder Reservoir, 5275 Reservoir Road, Boulder, CO, 80301, United States
The Boulder Stroke & Stride offers Boulder area athletes a fun 1-lap 750 Meter Swim, or 2-Lap 1500 Meter swim in Boulder Reservoir, followed by a 5k run on the reservoir dam on 8 Thursday evenings (plus one Wednesday evening) throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter event, while more seasoned athletes get the thrill of starting alongside some of the top athletes in the world in the 1,500 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food, beanie for 6-pack entries, and series prizes are just the beginning!

Colorado Triathlon
2024-06-01 | Boulder Reservoir, 5275 Reservoir Road, Boulder, CO, 80301, United States
Colorado Sprint Triathlon: 750 meter swim, rolling and fast 17 mile bike, and finishes with a 3.1 mile run
Colorado Olympic Triathlon: 1500m swim, 23.5 mile bike, and a 10k run
Colorado Olympic Duathlon: 5k run, 23.5 mile bike, and a 10k run
Colorado Aquabike: Will feature a 1500 meter swim and a 24.8m bike

IRONMAN 70.3 Boulder
2024-06-08 | Boulder Reservoir, 5275 Reservoir Road, Boulder, CO, 80301, United States
Presale Registration for 2023 IRONMAN 70.3 Boulder opens at 10am MT on Thursday, August 4, 2022.

XTERRA Lory
2024-06-15 | Lory State Park (Fort Collins), 708 Lodgepole Drive, Bellvue, CO, 80512, United States
XTERRA Lory Triathlon on June 18th is the perfect kick-off to the year for the seasoned off-road triathlete, or a great opportunity for the road triathlete wanting to try out a mountain bike triathlon for the first time.
The XTERRA Lory Triathlon features a 1/2 mile swim in the clear waters of Horsetooth Reservoir (Eltuk Bay), it’s one of the most scenic swims in the state with canyon walls on both sides. Then it’s on to a 2-Lap (beginner friendly) 12.2 mile single-track bike over rolling terrain, and across valley bridges at Lory State Park. Then you’ll get to finish things off with a fun and challenging 4.8 mile (8k) run through the clouds on single-track trails! This is the perfect off-road triathlon for beginners to experts. The course is designed so that anyone can have fun and everyone will be challenged! Entries will be limited to 350 participants, and we sold out 2011-2021 in early April!
BACK FOR 2022: Stand Up Paddleboard Option instead of the 1/2 mile swim (you must bring your own SUP)!

Loveland Lake to Lake Triathlon
2024-06-22 | North Lake Park (Loveland), 2750 N. Taft Ave., Loveland, CO, United States
This event provides a beautiful venue. The transition area and lake are near North Lake Park. North Lake Park is a nice setting for competitors and families. It has a children’s train that operates throughout the day and is adjacent to Benson Sculpture Park, which is the site of Loveland’s annual Sculpture in the Park each August.

Boulder Sunrise Triathlon
2024-06-23 | Boulder Reservoir, 5275 Reservoir Road, Boulder, CO, 80301, United States
Kick off your summer of racing in Boulder.
