The Grand Slam of Ultrarunning closed at the Wasatch Front 100 in Kaysville, Utah, on Saturday, where Kevin Stewart won in 20:41:09 and Sarah Ostaszewski took the women's race in 25:18:50. Two hundred and thirty-six runners finished inside the 36-hour cut-off to earn a buckle, the fourth and final one required by anyone completing the Slam in a single summer.
Stewart's margin over Jose Cruz, last year's winner, was 33 minutes; Cruz finished in 21:14:32 and Keaton Larrabee was third in 22:05:25. Ostaszewski's win was the more emphatic of the two, coming by almost two and a half hours over Astrid Lindgren in 27:40:28, with Lindsay Phenix third in 28:24:50. Wasatch is the Slam's closing race by design, and its climbing and late-summer heat make it the leg most likely to end a season rather than crown one.
The weekend's most widely noticed result came from Lutsen, Minnesota, where Jessie Diggins won the women's Superior Fall 100 in 25:09:46 and placed fifth overall. Diggins, an Olympic cross-country skiing champion, is not the first winter endurance athlete to move to hundred-milers, but a fifth-place finish overall in a race of 256 starters is a substantial result rather than a curiosity.
Tyler Morley won the Superior 100 outright in 19:54:13, becoming only the ninth runner in the race's history to finish under 20 hours. Of the 256 who started, 151 recorded an official finish. At the Mogollon Monster 100 in Arizona, 101 miles and 16,000 feet of climbing on a 38-hour limit, Andy Chrysler won in 21:26:35 and Moriah Carty came from behind to take the women's race in 27:45:01.
In Quebec, Rose Vigneault set a course record of 16:06:43 to win the women's Ultra-Trail Harricana 125k and finished sixth overall, with Antoine Jolicoeur Desroches winning the men's race in 14:49:46. Seventy-eight North American ultras were on the calendar across the weekend. In Europe, Tor des Geants continues through the Aosta Valley, where the field is now several days into a 330-kilometre route with a 150-hour limit.