The 17th edition of the Zumbro Endurance Run played out last weekend in the bluffs of southeastern Minnesota, with Anna Twinem winning the women's 100-mile race in 26:33:59 and Korey Konietzki taking the men's title in 22:07:23 across a course that asks runners to repeat a single 17-mile loop six times for a cumulative 13,500 feet of elevation gain. Organised out of Theilman, Minnesota, on the west bank of the Mississippi River, Zumbro has become one of the spring's anchor dates on the central US trail-ultra calendar, sitting a week after Georgia Death Race and a fortnight before the Ice Age Trail 50.
Twinem, a Wisconsin-based ultrarunner with a strong 50-mile record, broke the women's race apart in the second half and never gave up the lead once she moved through 60 miles, finishing more than three hours clear of runner-up Maria Oostra (29:45:29). Angela Salgado completed the podium in 32:33:03. On the men's side, Konietzki ran a disciplined loop-based race, holding just inside a three-hour target for each circuit until the penultimate one, when he opened a decisive gap over a pursuing Joseph Barnes, who finished second in 22:20:37. Jimmy Ruby rounded out the men's podium in 23:16:38.
The Zumbro course is, in local shorthand, "runnable but unrelenting," stitching together a ridge-and-ravine loop through the Richard J. Dorer Memorial Hardwood Forest that is never technical in the Rocky Mountain sense but rarely flat for longer than a quarter mile. Loops start and finish at the race's tent-and-firepit base camp, and the 34-hour cut-off means finishers routinely complete a second full day of running after the longer night-time laps. The night sections were described as "the coldest in the 17-year history of the race" by race director Peter Goettl, with single-digit Celsius temperatures and frost forming on aid-station water at several points during the first night.
Beyond the flagship 100-mile, the weekend featured 50-mile, 34-mile and 17-mile distances, with a combined field of over 500 runners across the four events. Minneapolis-based Anna Grace Tiede Hottinger won the open non-binary division in the 100-miler in 26:39:23, a time that would also have placed second in the women's race and underscores the depth now sitting outside the binary categories at US trail events. The 50-mile and 34-mile races doubled as Western States qualifier and USATF mountain-ultra-trail-eligible results, respectively, giving the weekend a practical stacking effect for entrants chasing both lottery tickets and championship selection.
Zumbro's place in the US calendar has shifted steadily in the past three years from a regional cult race to a reliable early-season form-guide for the summer's longer trail-ultra set-pieces. Several finishers this weekend are now confirmed for the Canyons Endurance Runs Western States qualifier in California next weekend, and organisers have pencilled in Twinem and Konietzki as candidates for the Ice Age Trail 50 on 9 May. With the race's 20th anniversary already scheduled for 2029 and entry numbers continuing to climb, Zumbro looks set to remain one of the signature early-spring American ultras long after the snow has left the Mississippi bluffs.