Lansing, Michigan's Capital City River Run, taking place on Sunday, September 20, 2026, invites runners of all abilities to experience a premier fall race. Choose your challenge with either a Half Marathon (13.1M) or a 5K Run/Walk, navigating a course praised for its flat and fast profile, perfect for setting a new personal best or enjoying a scenic run. Typical race day conditions in late September offer ideal running weather, with highs around 72°F and lows around 51°F, and only a 12% chance of precipitation, ensuring a comfortable and enjoyable experience.

The Half Marathon course winds through the vibrant heart of downtown Lansing, along Michigan Avenue, and onto the picturesque Lansing River Trail, offering captivating views of Crego Park, Hawk Island, and Potter Park Zoo. Runners can expect mostly paved surfaces, a blend of city streets and tree-lined pathways, enhanced by quirky trivia signs strategically placed to keep your mind as engaged as your legs. The 5K also provides a delightful route, showcasing landmarks like the Capitol and state Supreme Court. Both races kick off on Michigan Avenue in front of the Lansing Center and conclude with a celebratory finish at Rotary Park in downtown Lansing. Race production is consistently excellent, featuring clear signage, plentiful aid stations, and energetic volunteers, ensuring a smooth and supportive journey from start to finish.

More than just a race, the Capital City River Run boasts a rich history spanning over 30 years, recognized by Runner's World as one of the "10 Best Races You've Never Heard Of." This Michigan classic offers a truly unique experience, benefiting the Impression 5 Science Center and its mission to provide hands-on science education. All Half Marathon and 5K participants are celebrated with a high-quality crew neck sweatshirt and a finisher's medal. For families, the excitement begins Saturday, September 19th, with the Sohn Kids Races (1-mile and sprint), which include a medal, a stainless steel water bottle, and an invitation to a pizza party and day of play at the Impression 5 Science Center.