The field is limited to 700 athletes across all divisions. Prices rise on November 1, January 1, April 1 and again before race week; entries are not refunded.
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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Olympic Aquabike | AquabikeSwim 1,500 m · Bike 24.8 miOpen water swim | Jul 11, 2027 | $115 | – |
| Olympic Duathlon | DuathlonRun 3.1 mi · Bike 24.8 mi · Run 6.2 mi | Jul 11, 2027 | $125 | – |
| Olympic Triathlon | Olympic TriathlonSwim 1,500 m · Bike 24.8 mi · Run 6.2 miOpen water swim | Jul 11, 20277:15 AM | $125 | – |
Fees and dates are from the race's official website on the date shown below; confirm them there before you register.
Sunrise on race morning is at about 5:41 AM, and the Olympic Triathlon starts at 7:15 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.
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.
Around July 11 the day usually runs from 58°F at dawn to 89°F in the afternoon, with measurable rain on about 5% of days. Cold snaps dip to 54°F and hot years reach 95°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What athletes should know about Boulder Peak Triathlon, in brief, from the official race website.
Schedule and packet pickup
Check in runs 5:00 to 6:50 am and transition closes at 7:00. The first triathlon wave starts at 7:15 am with later waves five minutes apart. The swim course closes at 9:00 am and the bike course at 11:30 am, when the awards ceremony starts.
Schedule and packet pickup
Friday July 9, 5 to 7 pm, at Road Runner Sports in Westminster. Saturday July 10, 10 am to noon, at Colorado Multisport in Boulder. Race morning pickup costs 10 dollars and is chosen during registration.
Parking and travel
Boulder Reservoir charges spectators an entrance fee after 7 am. Dogs are not allowed from May 15 to Labor Day, and glass is not allowed.
More from the race
Relay teams can enter the triathlon, duathlon and aquabike. A stand up paddleboard division, individual or relay, replaces the swim with a paddle. A first timers wave is offered and is not eligible for age group awards.
Facts on this page come from the race's official website (withoutlimits.co/boulder-peak-triathlon-duathlon, withoutlimits.co/boulder-peak-triathlon-race-info, withoutlimits.co), checked Oct 7, 2026. Confirm dates and fees there before you travel.
Organize this race? Add details or a correction
An Olympic distance triathlon, duathlon and aquabike at Boulder Reservoir. The 24.8 mile bike course includes the steep Olde Stage Road climb, which the organizer puts at an average 15 percent grade.