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Triathlon Atlas

Half distance · 12 September 2027

IRONMAN 70.3 Santa Cruz

Santa Cruz, United States

The race at a glance

Official race website
Circuit
IRONMAN
Distance
Middle distance
Terrain
Road
Swim
1.9 km
Bike
90 km
Run
21.1 km
Date
12 Sept 2027
Registration
Open
Swim venue
Ocean
Average water temperature
17 °C
Bike profile
Flat
Bike elevation gain
696 m
Run profile
Rolling
Run elevation gain
116 m
High air temperature
22 °C
Low air temperature
13 °C
Overall cut-off
8 h 30 min
Altitude
3 m
Swim start
Rolling start

Edition history

202613 Sept 2026Held
20257 Sept 2025Held
20248 Sept 2024Held
202310 Sept 2023Held
202211 Sept 2022Held
202112 Sept 2021Held
20198 Sept 2019Held
20189 Sept 2018Held
201710 Sept 2017Held
201611 Sept 2016Held

How the day is laid out

The swim is held in the ocean. The wetsuit call is made on race morning, against the temperature measured then.

The organiser publishes 1.9 km of swimming, 90 km on the bike and 21.1 km of running.

The swim uses a rolling start: athletes enter the water a few at a time. The water is usually around 17 °C at this time of year.

The bike course is flat, with about 696 m of climbing.

The run course is rolling, with about 116 m of climbing.

Typical temperatures for the month run from 13 to 22 °C. The overall cut-off is 8 h 30 min.

Against the calendar

Where this race sits among the others

Ranks are computed across every race of the same distance.

  • Average water temperature

    17 °C · median 21 °C

    The 8th coldest of the 128 middle-distance races with a figure, across every circuit.

  • High air temperature

    22 °C · median 25 °C

    The 32nd coolest of the 152 middle-distance races with a figure, across every circuit.

  • Bike elevation gain

    696 m · median 569 m

    The 43rd hilliest of the 105 middle-distance races with a figure, across every circuit.

6

races of this distance pair a flat bike with a rolling run, out of 159. 53 share the bike profile alone.

45

races across every distance fall in September, out of 354.

68

races are held in North America. 11 of them in the same month as this one.

Questions about this race

When is IRONMAN 70.3 Santa Cruz 2027?
IRONMAN 70.3 Santa Cruz is held on 12 September 2027 in Santa Cruz, United States. Registration is open on the official race page.
Is a wetsuit allowed at IRONMAN 70.3 Santa Cruz?
Most likely. The average water temperature is 17 °C, below the 24.5 °C limit up to which wetsuits are allowed for age-group athletes. The official call is made on race morning.
What is the cut-off at IRONMAN 70.3 Santa Cruz?
The course closes 8 h 30 min after the start. Intermediate cut-offs after the swim and the bike are in the athlete guide.
How hard is IRONMAN 70.3 Santa Cruz?
The bike course climbs about 696 m, the 43rd hilliest of 105 half-distance races with a figure. The bike is labelled flat and the run rolling. Expect highs of about 22 °C on race day.

Where to stay

Hotels and rentals around the race venue, for the nights around race day.

Suggested stay: 10 Sept 2027 to 13 Sept 2027

The map is provided by Stay22. Bookings are made with the provider.

Races of the same distance in the same region

Entries are handled by the organiser

Registration and the athlete guide are on the official race page.

Open the official race page