Galveston Island, United StatesMarch 29, 202670.3 mi — Half Distance2 min readPublished July 13, 2026
Share
01·Course Characteristics
Wind and Heat in Galveston
A pancake-flat profile belies the true tactical difficulty of Galveston Island, where relentless coastal winds on the bike and high humidity with zero shade on the run test your pacing and hydration strategy.
Climate
27°C
Peak air · water 18-22°C · late March
Conditions
Humid
Sustained coastal winds · 80% humidity · no run shade
Elevation
240 m
Flat coastal route · San Luis Pass Bridge climb
Difficulty
5 / 10
Rated moderate; the pancake-flat terrain is offset by relentless coastal winds and high humidity with complete exposure on the run.
This edition has passed
Training for a future IRONMAN 70.3 Texas?
Registration for the next edition opens on a rolling basis. Start building your base now and we'll size a full plan the moment a new date is set.
An unusual feet-first jump start from a 1-meter high dock launches you into the protected saltwater of Offats Bayou. Although spared from ocean swells, wind-driven lake chop is common and a steady right-to-left current along the back stretch will try to push you off course.
02
Bike
Coastal Wind Grind
Texas Coastline Highway
DISTANCE
90 km
LOOPS
1
ELEVATION
240 m
TERRAIN
Flat & exposed
WIND
24-32 km/h
This out-and-back course is incredibly fast but completely exposed to coastal elements. Expect a swift tailwind in one direction and a grueling, sustained headwind or crosswind in the other, with the San Luis Pass Bridge representing the only real elevation.
03
Run
The Winding Loops
Moody Gardens Complex
DISTANCE
21.1 km
LOOPS
3
ELEVATION
23 m
SHADE
None
SURFACE
Mixed terrain
A highly technical, flat three-loop run featuring approximately 60 turns across pavement, gravel, grass, and a brief athletic track segment. The complete lack of shade exposes you directly to the midday sun and rising coastal humidity.
03·AVG beginners' Training Timeline
From zero to the finish line
16 weeks
This 16-week plan is specifically engineered to prepare you for the unique environmental strains of Galveston. By targeting sustained aerobar endurance to combat headwind drag and incorporating heat-adaptation and turn-heavy run sets, you will build the durability needed to finish strong despite high humidity and flat, unrelenting pedaling.
Today · WK 0Race Day
WK 1–4
Aerobic Foundation
Build a robust aerobic base and get comfortable with high-cadence swimming and basic core strength.
WK 5–8
Wind & Strength Build
Develop muscular endurance and sustained power to handle unrelenting winds and long-course aero positioning.
WK 9–13
Race-Specific Durability
Simulate race-intensity efforts in the heat and practice technical running with frequent turns.
WK 14–16
Peak & Taper
Taper volume while maintaining intensity to peak for coastal winds and humid race-day pacing.
Adapts to your fitness, schedule & recovery every week.
Expect a cool 14-15°C start rising to 24-27°C with up to 80% humidity by the afternoon. Utilize ice and cold water at the mile-spaced run aid stations to keep your core temperature down under the direct sun.
Fuel & hydration
Due to high humidity and heavy sweating, target 700-900ml of fluid and high sodium intake per hour. Bike aid stations are at miles 14, 27.5, and 45; prepare to use Mortal Hydration on course and secure your bottles tightly to avoid losses on early bumps.
Pacing
Do not burn your matches in the fast, wind-assisted half of the bike ride. Save energy to push through the grueling headwind return, then prepare for a choppy running rhythm due to the 60 sharp turns on the run course.
Gear & logistics
Arrive via Houston Hobby Airport (HOU) for a smooth 45-minute drive. Secure a low-profile front wheel to maintain control in 24-32 km/h crosswinds, and use tight, heavy-duty bottle cages to prevent losing nutrition over early speed bumps and potholes.
Frequently Asked Questions
What is the water temperature and swim format for IRONMAN 70.3 Texas?
The swim takes place in the saltwater Offats Bayou, where water temperatures typically average 65–72°F (18–22°C), usually making it a wetsuit-legal swim. You will start by walking approximately one mile to the start dock, where you will perform a feet-first jump from 3–4 feet above the water. While protected from large ocean swells, you should be prepared for wind-driven lake chop and a right-to-left current that requires frequent sighting.
How hard is the IRONMAN 70.3 Texas bike course?
The 56-mile bike course is rated as moderate because, while the profile is pancake-flat with only 265 to 790 feet of elevation gain, the environmental factors are highly challenging. You will experience strong, relentless coastal winds with a fast tailwind in one direction and a punishing headwind or crosswind in the other. Additionally, the first 2 miles through Moody Gardens feature speed bumps and potholes that require highly secure bottle cages to prevent losing your nutrition.
What is the run course terrain like at IRONMAN 70.3 Texas?
The 13.1-mile run is a flat, highly technical 3-loop course around Moody Gardens featuring approximately 20 turns per loop, or 60 turns total, which can make it hard to establish a steady running rhythm. The terrain is mixed, taking you across pavement, gravel, crushed rock, grass, and a brief section on a worn athletic track. Because there is virtually no shade on the course, you will be fully exposed to the midday sun and rising coastal humidity.
What is the nutrition and hydration strategy for IRONMAN 70.3 Texas?
Due to the high humidity levels reaching up to 80% on Galveston Island, staying on top of your hydration and sodium intake is critical to prevent dehydration. The on-course hydration features Mortal Hydration, as Gatorade products are no longer offered, with bike aid stations located at miles 14, 27.5, and 45, and run aid stations spaced roughly every mile. Be sure to secure your bottles tightly on your bike frame so they do not eject over the bumpy roads during the first two miles.
Which airport is best to fly into for IRONMAN 70.3 Texas?
Houston Hobby Airport (HOU) is highly recommended for athletes traveling by air, as it is located on the south side of Houston and offers a quick, traffic-free 45-minute drive to the race venue at Moody Gardens. In contrast, Bush Intercontinental Airport (IAH) is located on the far north side of Houston, which requires a much longer and more stressful drive through dense city traffic.
Your Personalized Plan
Stop guessing your intervals. Train for this course.
FE26 builds your plan around your Strava data, your real schedule, and the exact demands of IRONMAN 70.3 Texas— then adapts every week to how you actually perform.
