IRONMAN 70.3 BoiseVerified
IRONMAN 70.3 Boise: 90 km bike leg, 516 m of climbing. Elevation profile, what the terrain asks of you, the weather this race day usually brings, and how to pace this course.
Course intel
90 km with about 516 m of elevation gain, on the Boise plateau at 900–1,000 m elevation, where the thinner air makes the same power slightly faster. Mostly gentle undulation, no long climbs. Late July in Idaho is dry and hot; start hydrating early.
Source: Compiled from the official route and public race information
The terrain on this course
- Flat (±1.2%) makes up 63%
- Main climb 6.8–7.7 km: 33 m of gain (avg 3.9%)
- Main climb 21.1–22.9 km: 81 m of gain (avg 4.5%)
- Main climb 66.5–67.4 km: 27 m of gain (avg 3.2%)
Speed score
Rolling terrain is where you overspend without noticing: 20 extra watts on every little rise adds up and empties your legs for the back half. Let power touch the top of the range on the small stuff and leave it there.
Historical race-day weather (around 07-25): 21.9°C · Wind 2.1 m/s
0 to 100, and the higher it is the easier it is to post a good time. Points come off for terrain, for corners, and for the heat and wind this race has actually had over the last five years at the same time of year. Full explanation in the article “How the course score works”.