Grand Rapids, Michigan (United States of America) - "Brian Diemer Family of Races". We are happy to return to the roads in 2026, so come run with three time Olympian Brian Diemer on our flat and fast 5k course. We have 6 live bands on our course, kids runs, handcycle, My Team Triumph, and prize money. Don't forget - if you beat Brian, you win a donut! This year we are celebrating the 36th Anniversary of the Brian Diemer Family of Races and are excited to share that our event has become its own 501c3 non-profit. Check out our web page. www.diemerrun.com

Laingsburg, Michigan (United States of America) - "Summer Trail Fest Ultra 50K, Half Marathon, & 5 Mile". Summer Trail Fest Ultra (STFU) is back for its fifth year on Saturday, June 13, 2026, at Sleepy Hollow State Park in Laingsburg, Michigan. This summer trail race is the perfect mix of beginner-friendly and PR-worthy, with smooth, well-marked singletrack and generous cutoffs that make it accessible for both new and experienced trail runners. Whether you’re ready for your first 50K ultramarathon, looking to nail a faster half marathon, or want to test yourself on the 5-mile trail race, STFU delivers a one-of-a-kind Michigan trail running experience. The course features about 90% well-groomed trails with minimal technical terrain, making it an ideal choice for anyone stepping up to longer trail distances. With 20:00/mile cutoffs for the 50K and 45:00/mile cutoffs for the Half Marathon, you’ll have plenty of time to finish strong. Aid stations are well-stocked with water, electrolytes, gels, and real food options, so you can run without a crew and still be fully supported. After the finish line, the fun doesn’t stop. Stick around for a post-race cookout and BBQ featuring burgers, hot dogs, sides, and plenty of trail camaraderie. In 2026, spectators can even purchase picnic tickets, so your family and friends can join the celebration too. Even better, STFU is the summer counterpart to the February Winter Trail Fest (WTF) Half Marathon & 5 Mile in Brighton and Middleville. Each year, the STFU and WTF medals are designed to magnetically connect into one giant finisher medal. You can also register through the WTF + STFU bundle to save 15% off each race while guaranteeing your spot in both events. Why run STFU? Beginner-friendly trail race with smooth, scenic singletrack, distances for everyone: 50K, Half Marathon, and 5 Mile (run or ruck), generous cutoff times (20:00/mile for 50K, 45:00/mile for Half), well-stocked aid stations so you can run without a crew, excessively well-marked course that keeps navigation stress-free, post-race cookout and BBQ celebration at the finish line, medals that magnetically connect with Winter Trail Fest for a full-season accomplishment, central Michigan location convenient to both east and west sides of the state. Summer Trail Fest Ultra, Half Marathon, and 5 Mile is more than just a race; it’s a celebration of summer trails, community, and the joy of finishing something big. Register today and get ready to STFU and Run on June 13, 2026! https://runsignup.com/Race/Info/MI/Laingsburg/STFUandHalf

Dearborn, Michigan (United States of America) - "Dearborn Decades 5K". Kick off August racing in Southeast Michigan with the Dearborn Decades 5K, a fast, fun, USATF-certified race at Ford Field Park. Taking place August 9, 2026, this community-favorite 5K welcomes runners and walkers of all paces, families with strollers, and anyone who loves a good theme. Whether you're chasing a new PR, gearing up for fall racing, or dressing for your favorite decade, Dearborn Decades brings together everything people love about a great 5K: speed, community, nostalgia, and a course built for every type of runner. About the Race: Dearborn Decades 5K blends speed, energy, and personality. Athletes love the USATF-certified course, easy logistics, and the welcoming vibe that makes this one of the most popular summer 5Ks in Southeast Michigan. Costumes are encouraged but not required; it's a race where you can come for the PR, the outfit, or both. After you finish, stick around and enjoy the start of Dearborn Homecoming, which begins just after most participants have wrapped up their morning. Why Runners Choose Dearborn Decades 5K: fast USATF-certified course ideal for PR attempts, mid-summer timing perfect for fall marathon and half marathon training, welcoming to all paces—runners, walkers, families, and strollers—fun decade-themed atmosphere with optional costumes, easy race-day logistics including parking, packet pickup, and awards, great Southeast Michigan location with an accessible park venue, and part of multiple Trivium Racing Running Series and Club Competition for extra motivation and rewards. A finisher medal connects to five others in the Trivium Racing Mega Medal Series. Part of the Trivium Racing Michigan Running Series, Club Cup, and Mega Medal Series: Dearborn Decades 5K is part of the Trivium Southeast Michigan Running Series, the Trivium Club Cup, and the Trivium Mega Medal Series. Every finisher earns points toward season standings for themselves and their run club, and all participants receive a connecting finisher medal that links with five other 2026 races to create the full Trivium Mega Medal. 2026 Mega Medal Series: Dearborn Decades is the third race in the six-race 2026 Trivium Mega Medal Series. Register once, race all six events (in-person or virtually), and collect medals that magnetically connect into one giant, year-long achievement. 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 & 7.5 Miler, November 27, 2026, Commerce Township, MI. https://runsignup.com/Race/MI/Dearborn/DearbornHomecoming5k?aflt_token=7LipmEOzbECERDzMZ3v2Xv14ohnqORDf

Detroit, Michigan (United States of America) - "Run the 313". Come Race the 313! Get ready to lace up and celebrate everything that makes Southeast Michigan’s running scene unforgettable! Run the 313 5K isn’t just a race, it’s a full community experience, hosted in Detroit’s Palmer Park by Trivium Racing and WeRun313. This fast, flat, USATF-certified course is built for everyone: seasoned runners chasing a PR, first-timers stepping up to the start line, families with strollers, and kids soaking up the race-day magic. And the celebration doesn’t end when you cross the finish line. Stick around and enjoy the post-race hype, music, community vibes, recovery and cool-down opportunities, and all the energy you’ve come to expect from WeRun313 and Trivium’s biggest Detroit event of the year. Plus, custom race swag, great awards, and plenty of reasons to hang out with your people. Don’t miss out on one of Detroit’s most uplifting race-day traditions. Let’s make 2026 the best year yet! https://runsignup.com/Race/MI/Detroit/Runthe313

Petoskey, Michigan (United States of America) - "Wolverine State 100". From Lake Michigan to Lake Huron, The Journey Continues. After an unforgettable debut in 2025, Wolverine State 100 returns for year two on October 10–11, 2026. Runners, relay teams, and crews will once again take on the rare chance to cross Michigan’s Lower Peninsula from lake to lake, racing from Petoskey to Alpena on a route built for grit, beauty, and pure endurance. Choose your challenge: 100 Mile – the full Lake-to-Lake journey, point-to-point across the state; 100K – a point-to-point test of strength that starts at Tomahawk Lake Campground and finishes in Alpena; 50K – an early Sunday morning out-and-back from Alpena with smooth surfaces, generous cutoffs, and the same Wolverine spirit; 100 Mile Relay – team up and conquer the distance together. Expect a mix of singletrack trail, gravel and limestone roads, and quiet seasonal roads through Northern Michigan’s forests and farm country. Trails are technical; expect roots, rocks, and leaves that require concentration and reward you with pure Michigan trail running. You'll run on packed dirt, sandy seasonal roads, grass, and pavement. Aid stations every 5–8 miles will keep you fueled, supported, and moving toward the Huron shore. While no 100-miler is ever easy, Wolverine is designed to be challenging yet approachable, a race that welcomes first-timers and rewards veterans alike. Finishers earn custom awards, with special recognition for those who break the 24-hour barrier on the 100-mile course. The Wolverine community made history in its first year. In 2026, we’ll keep building it one mile, one finisher, and one wild adventure at a time. https://runsignup.com/Race/MI/Petoskey/WolverineState100