Ironman 70.3 St. George
Saturday, May 1, 2027 · 6:30 AM
Sand Hollow Reservoir & downtown St. George
Ironman 70.3 St. George
Each spring, St. George hosts one of the more physically demanding half-distance triathlons in North America. Athletes swim 1.2 miles in Sand Hollow Reservoir, ride 56 miles by bike through Washington County's high desert, and finish with a 13.1-mile run through downtown St. George. The race pairs postcard scenery with real elevation change, and it has built a reputation among age-group triathletes as one of the tougher stops on the 70.3 calendar.
From Regional Race to World Championship Stage
St. George's status as a triathlon destination is not a marketing claim — it is a matter of record. The city hosted the Ironman 70.3 World Championship in both 2021 and 2022, drawing a world-championship-caliber professional and age-group field to race the same course locals train on year-round. That two-year run put St. George alongside past hosts Clearwater, Nice, and Zell am See-Kaprun as one of the few cities to have staged the sport's top 70.3 title race, and it is a reason the local event still draws a competitive field in years it is not a championship.
Swim, Bike, Run
The swim starts in Sand Hollow Reservoir — a warm-water, red-rock-rimmed lake that regularly serves as one of the places locals swim to beat the summer heat, though race-morning water in early May runs cooler than the water summer visitors find. Out of the water, athletes climb from the reservoir basin onto Washington County's rolling highway network for the 56-mile bike leg, a course with enough sustained climbing that pacing matters as much as raw power. The run finishes downtown, close enough to the district's restaurants and hotels that finishers do not have far to walk once they are done.
Getting There and Where to Watch
Sand Hollow sits a short drive from St. George at Sand Hollow State Park, and spectators who want to see the swim start should plan to arrive well before the first wave — parking near the reservoir fills early on race morning. The easiest spectating, with no timing pressure, is downtown near the finish line, where the run course loops close enough to see athletes pass more than once before they finish. Families making a weekend of it often split time between the race and the park itself; a day at Sand Hollow outside race hours means red sand beaches and water warm enough to swim without a wetsuit.
Who It Suits
This is not a good choice for a first triathlon. Desert heat risk and a genuinely hilly bike course mean it rewards athletes who have already raced a 70.3 elsewhere and want a harder benchmark. Racers or companions looking for something to do besides train can find Sand Hollow Golf Club a few minutes from the reservoir, and out-of-state entrants weighing a longer stay sometimes look at property near the venue in Sand Hollow Resort.
Where It Sits in the Calendar
The race anchors St. George's spring sports calendar, arriving before summer heat makes outdoor endurance racing riskier and after the shoulder-season cool of late winter. For a city that hosts marathon, cycling, and golf events year-round, the 70.3 remains the one with a genuine global following — the direct result of two years on triathlon's biggest 70.3 stage.
Frequently asked questions
Is the swim wetsuit-legal at Ironman 70.3 St. George?
It depends on water temperature on the morning of the race. Sand Hollow Reservoir is warm enough by mid-summer that local swimmers go without a wetsuit, but early-May water is typically cooler, so wetsuit legality is decided race morning based on the reading at the swim start.
Are roads closed on race day?
Yes. The bike and run routes run under rolling closures that reopen a given stretch of road once the field has cleared it, rather than closing the whole course for the entire day. Check the event's final athlete guide the week of the race for the specific streets and times affected.
Is it free to watch, and where should I stand?
Spectating does not require a race entry or ticket. The swim start at Sand Hollow gives the best view of the mass start, while the downtown finish area lets you see the same athletes pass multiple times as the run course loops before the finish line.
Why doesn't the Ironman 70.3 World Championship come back to St. George every year?
Ironman has rotated the 70.3 World Championship to a different host city each year since 2014. St. George's run as host in both 2021 and 2022 was unusual — most cities host once before the race moves on — but it was never a permanent slot.
How early should I get to Sand Hollow to see the swim start?
Plan to arrive well before sunrise. Parking near the reservoir is limited and fills before the first wave enters the water, and there is no shuttle loop directly to the swim start the way there is for the finish line downtown.
What is the overall time cutoff to finish?
Ironman 70.3 races, including this one, run on the series-standard 8-hour-30-minute overall cutoff from the professional start, with individual cutoffs for exiting the swim and completing the bike leg along the way.