Trenton Summerfest Half Marathon, 8K, and 5K

Trenton Summerfest Half Marathon, 8K, and 5K - June 27, 2026 Looking for a fast, scenic early-summer race in Southeast Michigan? Trenton Summerfest Half Marathon, 8K, and 5K on June 27, 2026 features USATF-certified courses, flat and runner-friendly routes, and a welcoming atmosphere for every pace. The Half Marathon starts early to help athletes beat the heat, while the 8K and 5K begin a bit later - ideal options whether you’re chasing a PR or enjoying a fun run or walk with friends. Run through Elizabeth Park, along the river in Trenton, and - if you re taking on 13.1 - through Gibraltar on a course known for smooth organization, great support, and well-stocked aid stations. With low elevation gain, beautiful scenery, and strong community energy, this is a perfect way to kick off your summer racing season. Why runners choose Trenton Summerfest: All distances are USATF-certified Early Half Marathon start helps athletes beat the heat PR-friendly Half Marathon with just 96’ of elevation gain Scenic 8K with rolling variety Fast, flat 5K great for runners and walkers Beautiful routes through Downriver - Elizabeth Park, Trenton, and Gibraltar Welcoming environment for all paces Strong on-course support and great awards Part of the Trivium Michigan Mega Medal Series Part of the Trivium Michigan Mega Medal Series Trenton Summerfest is the second race in the six-race Trivium Michigan Mega Medal Series. Register once, run your chosen distances, and earn a medal at each event - each one connecting magnetically at year’s end to form a single giant Mega Medal. Run in-person or virtually, depending on your goals and schedule. 2026 Mega Medal Series Lineup Prove It 5K & 10K - April 18, 2026 · Milford, MI Trenton Summerfest Half Marathon, 8K, & 5K - June 27, 2026 · Trenton, MI Dearborn Decades 5K - August 9, 2026 · Dearborn, MI Run the 313 5K - August 22, 2026 · Detroit, MI Growler Gallop Atwater 10 Mile & 5K - September 27, 2026 · Detroit, MI Black Toenail Friday Half Marathon & 7.