Union Founder's Day 10K | 5K

Lace up for a unique evening challenge at the Union Founder's Day 10K | 5K, set for Saturday, May 9, 2026, in the charming historic town of Union, MO. This event is renowned as the oldest and longest-standing road race in Franklin County, and one of the oldest in the St. Louis metro area, building a reputation for being a tough yet rewarding experience for participants. Runners will navigate a challenging course through the heart of Union's historic county seat, culminating in a fast, downhill finish for approximately the last mile of both the 10K and 5K distances. Typical race day conditions in early May feature pleasant highs around 73°F and lows near 48°F, with only a 20% chance of precipitation.

What truly sets this race apart is its integration into the lively Union Founder's Day Festival, offering an unforgettable atmosphere with an evening start time of 6:00 PM CDT. The start and finish lines are located at the courthouse square in downtown Union, MO, placing you directly in the heart of the festivities. After conquering the course, runners aged 21 and over can celebrate their achievement with a complimentary beer, enjoying live music, food trucks, and a vibrant cornhole tournament as part of the family-friendly festival. The Union Founder's Day 10K | 5K proudly supports the Union R-XI Foundation, with proceeds benefiting local education initiatives. Join this cherished tradition for a challenging race and a memorable community celebration.