The 2026 Chicago Marathon has assembled an impressive men’s elite field featuring some of the world’s leading distance runners. Uganda’s Jacob Kiplimo, Kenya’s Amos Kipruto, Daniel Mateiko, Ethiopia’s Tadese Takele and Milkesa Mengesha are among the headline names.The marathon is slated for Sunday, 11 October.Six men in the field have run under 2:04:00 in the marathon over the past two years, setting the stage for a competitive contest on the streets of Chicago.Download our MozzartSport App For More NewsBeyond the battle for the title, attention will also be on whether the winner can challenge the course record of 2:00:35 or even the world record of 1:59:30. A sub-two-hour performance would also mark a historic milestone for a marathon held on American soil.Kiplimo, the defending champion, enters the race as the leading favourite following a remarkable progression in his marathon career.##NAJAVA_MECA_10017201##The 25-year-old Ugandan has improved his personal best in each of his three marathon appearances, clocking 2:03:37 at the 2025 London Marathon, 2:02:23 in Chicago last year and an impressive 2:00:28 in London in 2026.His credentials extend well beyond the marathon. Kiplimo is a four-time world champion across cross-country and half-marathon competition and has established himself as one of the most formidable distance runners of his generation.He also holds the fastest half-marathon performance in history, although his 56:42 mark was not ratified as a world record because officials determined that he had benefited from drafting behind a pace car.Kosgei, Lokedi headline loaded Chicago Marathon women's fieldHaving finished third at the London Marathon in April, Kiplimo will be looking to return to winning ways in Chicago and reinforce his status among the world's elite marathoners.However, questions remain about his preparation for Sunday's race.Unlike his previous marathon build-ups, which included a fast half-marathon race before the main event, Kiplimo has not competed since London in April. Whether that decision reflects a change in preparation or an interruption to his training will be one of the key talking points ahead of the race.If Kiplimo is not at his best, the door could open for a strong challenge from his experienced Kenyan and Ethiopian rivals.Kipruto leads Kenya's challengeKipruto will be among the principal challengers as he seeks to convert his consistency into another major marathon victory.Kericho comes alive as loaded fields battle in fifth national Cross CountryThe 34-year-old has enjoyed an impressive run of results, winning the Hamburg Marathon in 2:03:46 last year before finishing second in Chicago in 2:03:54 and fourth at the London Marathon in 2:01:39 in 2026.His recent performances underline his ability to compete against the strongest fields in the world. However, the Kenyan will need to produce something exceptional to overcome Kiplimo and the other leading contenders.Although Kipruto has won four marathons in his career, his record in the Abbott World Marathon Majors highlights the challenge ahead, having secured one victory in 12 appearances at the series' major races.Nevertheless, his experience and proven ability to deliver consistently at the highest level make him a serious contender for the podium.From fighting organised crime to championing clean sport: Günter Younger’s unlikely path to WADAMateiko will also be looking to make an impression as he continues his transition into marathon running.The 28-year-old, an Olympian in the 10,000m, finished fourth at the Tokyo Marathon earlier this year in a personal-best time of 2:03:44.Mateiko has already demonstrated his ability over shorter distances, winning the 10,000m at the 2024 Prefontaine Classic, which also served as Kenya's Olympic trials.His recent form offers further encouragement. He clocked 58:30 in the half-marathon on August 23, a performance that suggests he is in good shape heading into Chicago.Although he is yet to win a marathon, Mateiko has the speed and endurance to challenge the established names if he manages his race well and remains competitive in the closing kilometres.Zablon Chumba out to defend Lisbon title as Ruth Chebitok eyes course recordThe Kenyan will be hoping to turn his strong personal-best performance in Tokyo into a breakthrough result on one of the sport's biggest stages.Takele offers a formidable Ethiopian threatEthiopia's Takele could prove to be Kiplimo's biggest challenger if the defending champion is below his best.The 24-year-old has already established himself among the leading marathon runners, winning the Tokyo Marathon in both 2025 and 2026.Takele, who won a silver medal in the 3,000m steeplechase at the 2021 World Under-20 Championships, has demonstrated impressive versatility in his transition from track competition to road racing.His personal best of 2:03:23, set in Tokyo in 2025, places him among the fastest men in the field. Bernard Biwott headlines loaded Frankfurt Marathon field on returnHis recent success also suggests that he has the confidence and tactical experience required to compete for another major title.His relatively young age makes him one of the most intriguing athletes in the lineup, having moved to the marathon early in his career and quickly established himself as a consistent winner.Mengesha seeks a return to winning formAnother Ethiopian to watch is Mengesha, the 2024 Berlin Marathon champion.The 26-year-old holds a personal best of 2:03:17, set in Berlin, and has three marathon victories to his name.Although his recent major marathon results have been disappointing, finishing 10th in London in 2025 and 10th in Boston in 2026, Mengesha remains a dangerous competitor.His performance in Boston was particularly notable for its aggressive approach. He led the field by 12 seconds at the 30km mark before fading in the closing stages.How AK is leveraging AFCON 2027 upgrades to prepare Kasarani for 2029 World ChampionshipsIf he can maintain his early pace without losing strength late in the race, Mengesha could challenge the leading group in Chicago.He also won the Shanghai Marathon in 2025, demonstrating that he remains capable of delivering strong performances despite his recent struggles at the majors.American runners look to challenge the eliteWhile the African contingent dominates the list of the fastest entrants, the race will also provide a major test for the leading American men.Vinny Mauri is among the home athletes attracting attention after producing a remarkable 2:05:54 performance in Toledo earlier this year, achieved in a largely solo effort.The performance has raised expectations ahead of his first major marathon test against a world-class field.Mauri has drawn attention for his high-volume training approach, increasing his workload from an average of 97 miles per week before his Toledo breakthrough to approximately 122 miles per week during the 10 weeks leading into Chicago.A substantial portion of that training has been completed on treadmills, prompting discussion among coaches and analysts about the potential benefits of high-volume running at controlled intensities while managing physical stress.His performance comes amid a strong period for American distance running, with 20 American men reportedly breaking the 2:10 barrier in 2026.Collen Kebinatshipi reveals next target after dominant seasonHowever, the challenge for the home runners will be translating that depth into competitive results against the world's fastest marathoners.Mauri will line up alongside Clayton Young and Charles Hicks, while established American contenders Conner Mantz and Zouhair Talbi will also be looking to make their mark.Their performances will offer an indication of how competitive the United States' men's marathon programme has become as athletes build towards the next Olympic cycle.