Boulder Sunrise Triathlon

at the Boulder Reservoir, Colorado

June 27, 2021


Kick off your summer at the Boulder Sunrise Triathlon! Boulder, CO is a triathlete’s paradise! 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 Boulder Reservoir.


Swim Course
Sprint 750m (0.47mi) - Olympic 1500m (0.93mi)

This clockwise rectangular course starts and finishes at the swim beach of the Boulder Reservoir. Kayaks, sea doos, boats, and lifeguards will be in the water to support all athletes. If you need a rest, while in the water, waive your arms or simply swim to the nearest kayak. You can hold on to any vessel without penalty as long as there is no forward propulsion. If you need to cut your swim short for any reason, let the water support team member know, and they will bring you in to shore.

Bike Course
Sprint 17.3 mi - Olympic 26.4mi

Rolling hills at the base of the fabulous Flatirons! The views on this course can’t be beat! Athletes will leave the park through the main entrance, then head south for a right on Jay Rd. At about the 3 mile marker, you will veer right onto 28th St, then again onto N Foothills Hwy.

Sprint Athletes: Around the 7 mile point you will come to Neva Rd where you will make a right hand turn. After about 2 miles you will ride south & east onto Niwot Rd, then in another 2 miles you will turn right onto N 63rd St. After approximately 1.5 miles heading south you’ll approach the aid station… just in time to turn right onto the Diagonal Hwy, hit Jay Rd again for a short stretch & head back into the park the way you came & get set to transition.

Olympic Athletes: Around the 7 mile point you will come to the intersection where Sprint athletes veer right… Olympic athletes should continue north for about 3 miles to a right hand turn onto Nelson Rd. Continue a little over 5 miles before turning right onto N 75th St. Travel south for approximately 1.5 miles before a jog west to 73rd, then another 1.5 before a right onto Niwot and a left onto 63rd; your next right turn is onto Diagonal Hwy. Continue on Diagonal for approximately 4 miles and then turn right on Jay Road then a quick right on 51st street for your final 2.8 miles to transition!

NOTE: You will be cycling on roads that are open to traffic. Please stay right and stay on the shoulder. If you would need to leave the boundaries of the shoulder to pass, DO NOT PASS.

Run Course
Sprint / 5K (3.1mi) - Olympic / 10K (6.2mi)

This out and back course is flat, fast & beautiful as you run across the Boulder Reservoir dam. Prepare for that slight downhill sprint to the finish!

There will be aid stations approximately every mile. 5K course will have 3 opportunities to fuel up, while the 10K course will have 6 opportunities. 


Distance11/30 - 12/7through 12/31through 4/5through 6/206/21-6/27
Sprint Tri$80$90$100$110$120
Olympic Tri$105$115$125$135$145
Sprint Tri Relay$115$125$135$145$155
Olympic Tri Relay$135$145$155$165$175
Duathlon Relay$115$125$135$145$155

Boulder SUNRISE Tri: Packet Pick Up

Saturday, June 26th 


Westminster Location TBD

Sunday, June 27th

5:30-8:00 am

Boulder Reservoir Parking Lot


6:00am: Transition Area Opens

6:00am: Race Day Packet Pick Up 

7:15am: Olympic Waves Start

7:30am: Aquabike Start

7:40am: Sprint Waves Start

8:00am: Duathlon/10K/5K Start

8:45am: Swim Cut-Off

10:30am: Bike Cut-Off

12:00pm: Run Cut-Off / Course Closed

register now

Boulder Sunrise - June 27, 2021



SKU: Boulder Sunrise 2021 Category:

Additional information

Race Type

Aquabike Individual, Aquabike Relay (Captain), Aquabike Relay (Team Member), Duathlon Individual, Duathlon Relay (Captain), Duathlon Relay (Team Member), Olympic Individual, Olympic Relay (Captain), Olympic Relay (Team Member), Sprint Individual, Sprint Relay (Captain), Sprint Relay (Team Member)


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BOULDER SUNRISE Triathlon: course Maps


Swim Course

Boulder Reservoir
Sprint 750m (0.47mi) - Olympic 1500m (0.93mi)
Swim Course

Bike Course

Boulder Reservoir
Sprint 17.3mi - Olympic 26.4mi
Sprint Courseolympic Course

Run Course

Boulder reservoir
Sprint 5K (3.1mi) - Olympic 10K (6.2mi)

we care about your safety

We want you to feel confident when registering for a BBSC race and those already registered can have peace of mind knowing you have options and will not lose any portion of your race entry. We believe our COVID-19 transfer policy is the best in the industry, going above and beyond for the athletes who choose to race with us.
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