Skip to content
Triathlon Atlas

Full distance · 26 September 2027

IRONMAN Chattanooga

Chattanooga, United States

The race at a glance

Official race website
Circuit
IRONMAN
Distance
Full distance
Terrain
Road
Swim
3.8 km
Bike
180 km
Run
42.2 km
Date
26 Sept 2027
Registration
Open
Swim venue
River
Average water temperature
25 °C
Bike profile
Rolling
Bike elevation gain
1,580 m
Run profile
Rolling
Run elevation gain
351 m
High air temperature
27 °C
Low air temperature
18 °C
Overall cut-off
16 h 30 min
Altitude
206 m
First edition
2014
Swim start
Rolling start

Edition history

202627 Sept 2026Held

How the day is laid out

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

The organiser publishes 3.8 km of swimming, 180 km on the bike and 42.2 km of running.

The swim uses a rolling start: athletes enter the water a few at a time. The water is usually around 25 °C at this time of year.

The bike course is rolling, with about 1,580 m of climbing.

The run course is rolling, with about 351 m of climbing.

Typical temperatures for the month run from 18 to 27 °C. The overall cut-off is 16 h 30 min.

The race was first held in 2014.

A swim with the current

The swim is point-to-point in the Tennessee River, from a dock 2.4 miles upstream of transition to Ross's Landing. All of it is with the current except the final stretch after the red turn buoy. ironman.com recorded 25 °C in the water in 2025 and 24 °C in 2026, and calls the wetsuit a race-time decision. Under IRONMAN rules, age-group athletes may wear one up to 24.5 °C; from 24.6 to 28.8 °C it is allowed but rules them out of awards and slots.

The bike is three loops on US-27 towards Soddy Daisy, with a dedicated lane. The run is two loops through downtown, the Riverwalk, Veterans Bridge and the North Shore.

Source: ironman.com, read on 20 October 2026.

Against the calendar

Where this race sits among the others

Ranks are computed across every race of the same distance.

  • Average water temperature

    25 °C · median 22 °C

    The 8th warmest of the 48 full-distance races with a figure, across every circuit.

  • High air temperature

    27 °C · median 25 °C

    The 19th hottest of the 52 full-distance races with a figure, across every circuit.

  • Bike elevation gain

    1580 m · median 1130 m

    The 14th hilliest of the 43 full-distance races with a figure, across every circuit.

6

races of this distance pair a rolling bike with a rolling run, out of 55. 20 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 Chattanooga 2027?
IRONMAN Chattanooga is held on 26 September 2027 in Chattanooga, United States. Registration is open on the official race page.
Is a wetsuit allowed at IRONMAN Chattanooga?
Yes, but without awards. The average water temperature is 25 °C: between 24.6 °C and 28.8 °C a wetsuit may be worn, but without eligibility for age-group awards or slots. The official call is made on race morning.
What is the cut-off at IRONMAN Chattanooga?
The course closes 16 h 30 min after the start. Intermediate cut-offs after the swim and the bike are in the athlete guide.
How hard is IRONMAN Chattanooga?
The bike course climbs about 1580 m, the 14th hilliest of 43 full-distance races with a figure. The bike is labelled rolling and the run rolling. Expect highs of about 27 °C on race day.

Where to stay

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

Suggested stay: 24 Sept 2027 to 27 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