The Ironman California Triathlon returns to Sacramento on Sunday, October 19, 2025, bringing thousands of athletes and spectators to the region for a full day of swimming, biking, and running events. While the event is an exciting celebration of endurance and athleticism, it also brings road closures and traffic impacts, particularly in and around downtown Sacramento. 

Light Rail Service – No Impacts Expected 

Good news for light rail riders! SacRT light rail service will operate as scheduled on light rail lines (Blue and Gold) throughout the day. Riders traveling to or through downtown can continue to use light rail without interruption. 
 
Bus Service – Route 11 Detour in Downtown 

Bus Route 11 will be detoured in the downtown area due to road closures associated with the triathlon course. Riders should plan for possible delays and temporary stop closures along the route. 

All other bus routes will operate normally, but riders traveling through downtown should still expect increased traffic and potential delays due to the event. 

Thank you for your patience as we support this major community event. Whether you’re cheering on athletes or just getting where you need to go, SacRT is here to help you travel safely and smoothly.