GO! St. Louis Announces 2026 Summer Event Lineup Featuring Trail Relays, Fast 5Ks and New Summer Sizzle Race Series

May 19, 2026

May 19, 2026 /ENDURANCE SPORTSWIRE/  – As summer nears, GO! St. Louis is inviting runners, walkers, families and fitness fans to take part in a diverse lineup of events designed to celebrate movement, community and fun throughout June, July and August.

Summer is the perfect season to refresh your routine, try something new, and rediscover the simple joy of movement through running. Longer days, warmer mornings, and vibrant community events create an ideal environment for building healthy habits while having fun outdoors. Whether you’re training for your first 5K, jogging with friends at lunch, or simply looking for an active way to enjoy the sunshine, running offers a flexible and rewarding way to stay energized all season long.

From an 82-mile trail relay stretching across Missouri countryside to family-friendly summer races in local parks, GO! St. Louis’ 2026 summer event calendar offers something for everyone — whether chasing a personal best, enjoying an evening fun run, or simply connecting with the local running community.

“Summer running in St. Louis is about much more than PRs and competition,” said Mona Vespa, President of GO! St. Louis. “These events are designed to create memorable experiences, encourage healthy lifestyles and bring people together in some of the region’s most unique and scenic locations.”

The summer lineup includes:

KT82 Trail Relay — June 6, 2026

The KT82 Trail Relay is the ultimate team running adventure, covering 82 miles through some of Missouri’s most scenic trails, roads and countryside landscapes. Register here.

Teams of either six or three runners tackle the relay course together, with each participant completing multiple legs that vary in terrain and difficulty, including paved trails, packed gravel roads and wooded singletrack. Members of six-person teams each run approximately 13 miles, while runners on three-person teams complete roughly double that distance.

The race begins at the Maryland Heights Aquaport parking lot in Maryland Heights and finishes in Hermann, where participants celebrate with a lively finish line afterparty featuring Salt + Smoke BBQ, 4Hands Beer and local Missouri wines.

The KT82 has become one of the Midwest’s premier relay experiences, combining endurance, teamwork and camaraderie with the beauty of Missouri’s trail systems and rolling countryside.

All-American 5K & Fun Run — June 21, 2026

Returning on Father’s Day weekend, the All-American 5K & Fun Run offers one of the fastest and most festive race experiences in the St. Louis area. Register here.

The event features a slightly downhill, speed-friendly 5K course that winds through the neighborhoods of Kirkwood and Webster Groves, along with a shorter one-mile fun run option perfect for families, walkers and younger participants.

Known for its patriotic atmosphere and community feel, the event also includes unique traditions like apple pie age-group awards and ice cream for finishers. The All-American 5K has become a favorite kickoff to summer for runners seeking a fast course and a family-friendly celebration.

Summer Sizzle Series — June 25 through August 6, 2026

New for 2026, the Summer Sizzle Series is a four-race Thursday night series designed to combine fitness, fun and community throughout the summer months. Details and registration are here.

Each event takes place at a different local park and features a unique distance, creating an approachable and social atmosphere for participants ranging from competitive runners to families and casual walkers. Every race night also includes a one-mile fun run option.

Participants can register for the entire series or individual races. Those who register for the full series receive an exclusive participant shirt, and runners who complete at least three of the four races earn a special series finisher medal.

The Summer Sizzle Series schedule includes:

• June 25: 2 Mile at Shaw Park
• July 9: 4K at Tower Grove Park
• July 23: 4 Mile at Lakeside 370 Park
• August 6: 5K at George Winter Park

Designed as equal parts race series and social gathering, the Summer Sizzle Series gives participants an opportunity to stay active, explore regional parks and enjoy the energy of the local running community throughout the summer.

Additional event details for all GO! St. Louis summer events can be found at GO! St. Louis’ website, which also features a community event calendar. We hope to see you getting your run on this summer!

About GO! St. Louis

GO! St. Louis is a nonprofit organization that encourages individuals and families in the St. Louis region to adopt a healthy and active lifestyle year-round through community collaborations, school-based programming and the creation of accessible fitness events.