Experience the iconic Ironman 70.3 (kilometre) race in Western Sydney this September; part of the international series of Ironman events, it’s sure to thrill sports fans and spectators alike.
An Ironman 70.3 is half the length of a full Ironman race, and the Western Sydney race has been voted number one for overall athlete satisfaction in a survey of thousands of athletes from all over the world who have competed in the event over the years.
Ironman 70.3 Western Sydney 2025 Dates, Course Map, Elevation Profile
The runners return to the Sydney International Regatta Centre in Castlereagh to complete the course, and spectators will have the opportunity to cheer them on as they come down the finish chute. Join thousands of spectators in beautiful Western Sydney and witness this incredible sporting feat.
The Ironman 70.3 Western Sydney race promises an exciting, inspiring, and incredible display of strength, talent and determination. Come and support local, national and international athletes as they compete in this gruelling event.
Swim Course
1.9km – The one-lap swim occurs in the man-made, sheltered Penrith Lake, home to the 2000 Olympic Sydney International Regatta Centre (SIRC). The iconic and purpose-built facility caters nicely for athletes and supporting spectators, as the rectangular-shaped course starts in front of the grandstand, making it the perfect swim course for a nervous swimmer. Once passing the grandstand again on the way back towards the swim finish, athletes will swim under the bridge and exit to Transition.
Bike Course
On the two-lap bike course, athletes will enjoy scenic views of the Blue Mountains and roll through the countryside.
Cyclists will exit the transition along the Regatta Lake, turning left to loop around Penrith Whitewater Stadium. Once the loop is complete, athletes exit the precinct via McCarthys Ln, turning left onto Castlereagh Rd. Athletes will continue along this road past the 15km mark and Godolphin Stables, where they’ll make a U-turn further along Castlereagh Rd.
After the U-turn, athletes will turn left, entering Brooks Ln, passing the 30km mark along Wilshire Rd. Riders will turn left onto Jockbett Rd, following onto The Driftway, where two U-turns will occur.
Athletes will then follow the same path until a left turn onto Castlereagh Rd again, where riders will head south towards the precinct. The second lap/finish line decision point is located on the northbound side of Castlereagh Road, on the corner of McCarthy’s Lane. For athletes heading towards T2, you will turn left onto McCarthy’s Lane, left into Sydney International Regatta Centre, and left again onto Media Rd. Complete a U-turn on Media Road before heading to transition. Technical turns will allow for a challenge, however the smooth road surfaces will see fast course times as athletes head to the run course.
Run Course
The 21.1km HOKA run course is set at the base of the stunning Blue Mountains and encircles the iconic Sydney International Regatta Centre (SIRC). Athletes will start their run by heading out of Transition, over the bridge, and turning right at car park Gate A to head up Old Castlereagh Rd. With views of the Blue Mountains to the West, participants will turn around at the Northern point of Old Castlereagh Rd to head back the way they came, passing the first Run Aid Station (R1) and following the signed course until they reach the water’s edge of SIRC.
At this point on the course, athletes will make a U-Turn to head back towards Transition to start their next loop; on the third approach to the Transition U-Turn, athletes will continue straight through to start their victory lap of SIRC. On their approach to the finish line, athletes will be cheered by spectators lining the footpaths to give them that extra boost they need to finish strong before they hit the stadium-like atmosphere at the finish chute.
The close and compact 3-lap course will create a stadium-like atmosphere for all to enjoy.
Transition
The event precinct in Penrith, Western Sydney, is home to the Sydney International Regatta Centre, purpose-built for the 2000 Sydney Olympics. The precinct is located 50km west of the Sydney central business district. Supporters have plenty of places to cheer on their athletes and to celebrate as they run down the finish chute.
Sprint Tri Western Sydney
They are excited to introduce a Sprint Tri to the IRONMAN 70.3 Western Sydney race day!
Western Sydney is already the perfect course and venue for many first-time IRONMAN 70.3 athletes. By adding a short-distance option, they hope to encourage even more people to try triathlon—all while giving them a taste of what it is like.
Athletes will swim 750m in the sheltered lake of the Sydney International Regatta Centre before completing a one-lap 20km bike ride along Castlereagh Rd, with views of the Blue Mountains. They will then finish their day with a flat and easy 5km run to the grandstand finish line.
IRONKIDS Western Sydney
Calling all kids aged 7-13! Become an IRONKIDS Champion on Saturday, 20 September 2025, at IRONKIDS Western Sydney.
IRONKIDS will participate in a Run/Bike/Run format.
Each IRONKID will receive a medal and IRONKIDS T-shirt.
It is a great day out for all, with a random prize draw afterwards.
Car Parking
Plenty of public parking is available on event day at Sydney International Regatta Centre. Access is via Old Castlereagh Road, and cars enter and exit via Gate C. Please follow instructions from Traffic Control and Ground Staff. *All maps are subject to change.
Castlereagh is about 67 kilometres northwest of the Sydney CBD in Penrith – just over an hour’s drive via the M2 or the M4. Penrith is the closest train station on the Main Western Line, and from there, you can catch a bus to Castlereagh.
If you’re travelling from interstate or overseas to support a competitor, there is a range of accommodation available nearby, but make sure you book early so you don’t miss out.
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