OC Marathon Running Festival

Prepare for an unforgettable running experience at the OC Marathon Running Festival on May 3, 2026, in sunny Costa Mesa, California. This premier 26.2-mile event offers a captivating journey through Orange County's most picturesque communities, boasting a net downhill course renowned for its speed and potential for personal bests, making it a Boston Marathon qualifier. Runners begin at the elegant VEA Newport Beach, a Marriott Resort & Spa, greeted by a breathtaking panorama of the Pacific Ocean and sweeping views along Ocean Boulevard through Corona del Mar and Newport Harbor. The course then winds through the scenic bluffs overlooking the Upper Newport Bay Estuary Reserve, continuing into the vibrant hearts of Irvine, Costa Mesa, and Santa Ana, showcasing a blend of coastal beauty, urban landscapes, and supportive neighborhood cheers.

While largely a fast course with the majority of elevation loss in the early miles, the OC Marathon presents strategic challenges with a few modest inclines, including a notable hill between miles 6.5 and 7, another around mile 14.5 over the 405 overpass, and a final rise near mile 23. Aid stations are generously spaced throughout, providing water, electrolyte drinks, and medical support, ensuring runners are well-hydrated and cared for. Typical race day conditions in early May are ideal, with comfortable highs around 72°F and lows around 57°F, accompanied by a minimal 1% chance of precipitation, creating a perfect climate for marathon running.

The finish line awaits at the lively OC Fair and Event Center in Costa Mesa, where participants are celebrated with a vibrant Finish Line Festival featuring live music, refreshments, and a well-earned finisher's medal. Praised by runners for its "smooth organization" and "unforgettable SoCal vibes," the OC Marathon is a celebrated tradition, forming part of the prestigious "Beach Cities Challenge." With ample community support, scenic diversity, and a reputation for being a runner-friendly event, the OC Marathon Running Festival promises an exceptional and rewarding experience for all participants.