Get ready to experience the vibrant Cinco de Mayo Half Marathon, 10K, and 5K, set to take place on Sunday, May 3, 2026, in beautiful Portland, Oregon. Kicking off and finishing at the scenic Sellwood Riverfront Park, this race offers a fantastic blend of urban charm and riverside beauty, making it a beloved spring event in the Northwest. Runners will enjoy a mostly flat and fast course along the Springwater Corridor trail, known for its paved and smooth terrain, perfect for chasing a personal best. Typical race day conditions in early May feature pleasant highs around 67°F and lows around 47°F, with only a 10% chance of precipitation, providing ideal weather for a memorable run.

The Cinco de Mayo Half Marathon is celebrated for its festive, fiesta-like atmosphere. Aid stations are strategically placed approximately every 2-3 miles along the Half Marathon and 10K routes, fully stocked with water, electrolytes, GU gels, and gummy bear chews to keep you fueled. Portable toilets are also available at aid stations and in the race village. What truly sets this race apart is the lively celebration awaiting you at the finish line, where participants are greeted with warm, cheesy quesadillas to refuel and commemorate their accomplishment.

Organized by Negative Split, a producer of numerous events across the Pacific Northwest, the Cinco de Mayo race is well-regarded for its organization and engaging atmosphere. Whether you're tackling the 13.1 miles, the 10K, or the speedy 5K, this event promises a fun, scenic, and well-supported experience. Join fellow runners for a fantastic day of fitness and festivities along the Willamette River.