The IRONMAN Triathlon Calendar: 2026 Into 2027

A long-course season is a year-long project, and most of it is invisible from race day. The athlete picks an “A” race — usually a fall full-distance IRONMAN or a World Championship slot — and works backward through a 70.3 build race, a long base block, and a winter of unglamorous volume. This calendar gives you the fixed dates to anchor that plan, plus a warning section every triathlon coach needs in 2026: three staple races are gone, and athletes are still planning seasons around them.

How to read these dates

IRONMAN publishes its North American schedule in waves — the current-year races are locked, but the following year’s dates typically don’t land until the fall. Each entry is graded:

• Confirmed — verified against multiple current listings for that exact date.
• Provisional — listings agree on the race but differ on the day, or only the month is firm.
• TBD / Pattern — the date isn’t published yet; the recurring slot is given for planning only.

The linked official IRONMAN pages are the source of truth. Where this calendar and ironman.com disagree, believe ironman.com.

World Championships

The split-venue era is over. From 2023–2025 the men’s and women’s full-distance Worlds alternated between Kona and Nice on separate days. Beginning in 2026, both genders race the same day in Kona — confirmed for October 10, 2026, and already locked for October 9, 2027. The 70.3 Worlds stays in Nice for 2026 and returns to Chattanooga for August 28–29, 2027 — part of a new five-year Chattanooga agreement that also brings back an IRONMAN Pro Series event. If you’re coaching toward that 2027 Worlds slot, note the qualifying cycle itself opens earlier than the venue announcement suggests: select international 70.3 races start awarding 2027 Chattanooga slots on July 5, 2026.

North American full-distance IRONMAN — 2026

Marquee 70.3 build & qualifier races

The half is where the full gets rehearsed. These are the North American 70.3s athletes most commonly slot into a full-distance build or use to chase a Worlds slot.

(70.3 Oceanside, the traditional West Coast season opener, ran March 28 in 2026 — past now — so its April 3, 2027 edition is the relevant planning target.)

Discontinued — do not build a season around these

This is the section that matters most this year. Three races that anchored thousands of season plans no longer exist:

• IRONMAN Arizona (Tempe) — the November 16, 2025 race was the final edition after 21 years, done in by course-permitting conflicts with Tempe’s ongoing development. IRONMAN is reportedly eyeing Lake Havasu City as a possible new home, but as of August 2026 nothing is confirmed or scheduled.
• IRONMAN 70.3 St. George — the iconic St. George course held its final race in 2025. Its North American Championship designation went with it.
• IRONMAN Mont-Tremblant (full 140.6) — discontinued after 2023. Only the 70.3 and 5150 remain at Tremblant (the 70.3 is in the table above).

If an athlete has any of these on a goal board, that’s a conversation to have now — not in October.

2027 outlook

The 2027 North American full-distance calendar is largely unannounced as of mid-2026 — IRONMAN typically releases it in the fall. The recurring fulls above (Lake Placid, Wisconsin, Maryland, Florida, Canada-Ottawa) usually hold their slots year over year, but do not assume 2026 dates carry to 2027; confirm when the schedule drops.

Notable international fulls

North American athletes regularly travel for these:

Using the calendar

Pick the “A” race first, then everything else falls into place: a 70.3 build race 8–12 weeks out, a long aggregation block before that, and a base that started the previous winter. The discontinued-race list is your first filter — make sure the goal race still exists before you write sixteen weeks of training toward it. Drop the confirmed dates into a Smagpie athlete calendar and periodize backward from race day.