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© 2026 raceindex.org. Derived figures use a published methodology; modelled costs are labelled.

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Ironman 70.3 Boulder

Ironman 70.3 Boulder

Boulder · JUN 2026 · Ironman

Data current as of 2026-06-24

At a glance

SettingRural

high-altitude course
Boulder Reservoir
Flatirons backdrop

Typical race-day conditions

Around race day in Boulder: 19°C typical, 1.6 mm rain, 16 km/h wind. (10-year Open-Meteo average.)

Distances offered (1)

Middle (70.3)

1,900 m swim · 90.1 km bike · 21.1 km run

Entry fee not published · non-drafting · 70.3 Worlds slots slots

Run terraintwo-loop reservoir-side
Laps2
SwimReservoir · ~21°C

Common questions

What triathlon formats does Ironman 70.3 Boulder offer?

Ironman 70.3 Boulder currently lists Middle (70.3) (1,900 m swim · 90.1 km bike · 21.1 km run) on raceindex.org.

Where can I verify Ironman 70.3 Boulder details?

Use the linked official event website alongside the raceindex.org provenance and methodology notes shown on this page.

Official event website ↗

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of 2026-06-24.

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (2)

Layer E archive-api.open-meteo.com
Layer A ironman.com · fetched 2026-06-24

Read the full methodology →

Ironman 70.3 Boulder — course, terrain & details · raceindex.org