Sponsored by:  

Have an event to List?
Whether a race, special group ride, training opportunity, or cycling-related community event, the 303 calendar showcases it all.  To have an event posted here please follow this link:  Event Policy Submission & Guidelines.

Loading Events

← Back to Events

Boulder Reservoir

+ Google Map
Boulder, CO United States

May 2019

Boulder Stroke & Stride Series

May 30
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

June 2019

ColoradoTriathlon

June 1
Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   ALREADY 42% SOLD OUT AS OF 12/28/2018! Who's ready to kick off the 2019 season?! The Colorado Triathlon is where Colorado comes to race on June 1st, 2019! The Colorado Triathlon - sprint & olympic distances, duathlon & aquabike options. To make the "can't miss" event of the season, we'll also have: amazing food and beverages provided by Noodles & Co., Ska Brewing Beer Garden, athlete full zip sweat shirts, and the best swag bag of the…

Find out more »

Boulder Stroke & Stride Series

June 6
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

IRONMAN Boulder

June 9
Boulder Reservoir Boulder, CO United States + Google Map

Boulder   Nestled at the foot of the Flatirons Mountains, Boulder, Colorado is a wildly popular home-based and vacation destination for triathletes. The city's health-conscious culture, near-perfect weather and breathtaking natural environment made it an instant favorite from the first running. Once finished in the water, the first transition will start athletes on a beautiful multi-loop course all contained within Boulder County, The course has a few pronounced climbs, but in general it's a fast one. Once done with the…

Find out more »

Boulder Stroke & Stride Series

June 13
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

Boulder Stroke & Stride Series

June 20
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

Boulder Sunrise Triathlon

June 23
Boulder Reservoir Boulder, CO United States + Google Map

Boulder   Kick off your summer at the Boulder Sunrise Triathlon! Boulder, CO is a triathlete’s paradise! With many pro athletes and Tri clubs attending, you’ll experience the best racing atmosphere around. You can work towards a new PR on this flat, fast bike course and enjoy views of the reservoir as you run at the water’s edge. This course makes the Boulder Sunrise a Colorado favorite, bringing triathlon clubs from all over the region to race at the notorious…

Find out more »

Boulder Stroke & Stride Series

June 27
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

July 2019

Boulder Stroke & Stride Series

July 4
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

Boulder Stroke & Stride Series

July 11
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

Boulder Peak

July 14
Boulder Reservoir Boulder, CO United States + Google Map

Boulder   The Boulder Peak Triathlon, Duathlon & Aquabike on July 14th is one of the countries longest and most well-known triathlons. For the veteran or first time racer, this is THE can't miss event of the summer triathlon season, and the crown jewel of the Colorado Triathlon Series. Racers are tackling the infamous "Olde Stage" Hill, boasting on average 15% grade on their way to the finish line! This race has earned it's spot on more than a couple…

Find out more »

Boulder Stroke & Stride Series

July 18
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

Tri Boulder

July 21
Boulder Reservoir Boulder, CO United States + Google Map

Boulder   ‘The Beast’ Long Course distance will be back for its second year! As one of Colorado’s most popular summer triathlons, Tri Boulder offers many different multisport race distances, all in one eventful day. Take in the natural beauty of the mountain backdrop that sets the scene for this iconic race destination. Most of the bike course will take place on rural Boulder county roads, with spectacular views of the Flatirons and surrounding green fields. Enjoy the after-race party with…

Find out more »

Boulder Stroke & Stride Series

July 25
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

August 2019

Boulder Stroke & Stride Series

August 1
|Recurring Event (See all)

An event every week that begins at 12:00am on Thursday, repeating until August 1, 2019

Boulder Reservoir Boulder, CO United States + Google Map

Boulder Reservoir   The Boulder Stroke & Stride enters its 18th season in 2019, and 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 9 Thursday evenings throughout the summer. Many participants make their open-water swimming debut in the beginner-friendly Stroke & Stride 750 meter swim. 250-400 participants enjoy the Stroke & Stride every week! Live timing, great post race food,…

Find out more »

IRONMAN 70.3 Boulder

August 3
Boulder Reservoir Boulder, CO United States + Google Map

Boulder   IRONMAN 70.3 Boulder kicks off at the pristine Boulder Reservoir with its spectacular Rocky Mountain backdrop. This even has been an athlete favorite for over a decade. IRONMAN 70.3 Boulder is one of the fastest IRONMAN events to sell out each year--making it one of the most sought-after races in the country. The extremely fast course provides personal records for many, even our local professional field. Where else in the country can you race against the best in…

Find out more »

September 2019

Harvest Moon Long Course

September 15
Boulder Reservoir Boulder, CO United States + Google Map

Boulder   The Harvest Moon Triathlon the 20th edition of this event takes place at the beautiful Boulder Reservoir on September 15th, 2019. 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,…

Find out more »
+ Export Events