Schedule and packet pickup
Race day
Athlete check-in runs from 5:45 to 7:00 am, when transition closes. The first wave starts at 7:15 am and later waves follow every 5 minutes. The swim cutoff is 9:00 am and the bike course cutoff is 10:45 am.
Colorado Triathlon 2027
- Date
- Saturday, June 5, 2027
- Location
- Boulder, Colorado
- Entry fee
- From $105
Go to the race website
Prices shown run until November 1, 2026, then rise in steps on January 1, April 1 and May 30. Relay teams can enter each race. A first timer wave of up to 50 goes last in the sprint and is not eligible for age group awards.
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Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Aquabike | Aquabike | Jun 5, 2027 | $105 | – |
| Olympic Duathlon | DuathlonRun 3.1 mi · Bike 23.5 mi · Run 6.2 mi | Jun 5, 2027 | $130 | – |
| Olympic Triathlon | Olympic TriathlonSwim 1,500 m · Bike 23.5 mi · Run 6.2 miOpen water swim | Jun 5, 2027 | $130 | – |
| Sprint Triathlon | Sprint TriathlonSwim 750 m · Bike 17 mi · Run 3.1 miOpen water swim | Jun 5, 2027 | $105 | – |
Fees and dates are from the race's official website on the date shown below; confirm them there before you register.
Race day planning
Light and altitude
Sunrise on race morning is at about 5:32 AM. The start sits about 5,320 feet above sea level, high enough that most athletes from lower ground race noticeably slower.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
Boulder Reservoir, Boulder, CO
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Typical race-day weather
Around June 5 the day usually runs from 51°F at dawn to 78°F in the afternoon, with measurable rain on about 20% of days. Cold snaps dip to 47°F and hot years reach 88°F.
Based on 60 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
Race guide
What athletes should know about Colorado Triathlon, in brief, from the official race website.
Schedule and packet pickup
Packet pickup
Pickup is on Thursday of race week from 4 to 7 pm at Road Runner Sports in Westminster and on Friday from 5 to 7 pm at Mike's Bikes in Boulder. Race morning pickup costs $10. USAT members bring their card and photo ID.
Parking and travel
Spectators
Boulder Reservoir does not allow dogs from May 15 to Labor Day or glass. Anyone arriving after 7 am pays the reservoir entrance fee.
Awards
Awards
Sprint and aquabike awards are at 10:30 am and Olympic and duathlon awards at 11:15 am, after a general ceremony at 9:45.
Rules and FAQ
Transfers
Entry fees are not refunded. An entry can be moved to another Without Limits triathlon, or to another athlete, up to 30 days before the race for a $10 fee.
Facts on this page come from the race's official website (withoutlimits.co/colorado-triathlon, withoutlimits.co/colorado-triathlon-race-info), checked Oct 7, 2026. Confirm dates and fees there before you travel.
Race details
- Where
- Boulder Reservoir, Boulder, COMap
- Course
- Road
- Start elevation
- About 5,320 feet
- Distances
- Sprint Triathlon, Olympic Triathlon, Duathlon, Aquabike
Organize this race? Add details or a correction
Quick answers
- When is Colorado Triathlon?
- Saturday, June 5, 2027.
- How much does it cost?
- Entry starts at $105 before processing fees.
- What distances are offered?
- Sprint Triathlon, Olympic Triathlon, Duathlon, Aquabike.
- Where does it start?
- Boulder Reservoir, Boulder, CO.
About the race
An early season race at Boulder Reservoir from Without Limits Productions, with sprint and Olympic triathlons, an Olympic duathlon and an aquabike. The sprint bike is a rolling 17 miles and the Olympic bike is 23.5 miles. The field is limited to 700 and the race has sold out in past years.