Kate Dolan, Samantha Shuss and Katie Gill run the Le Grizz 50-miler in Montana. Photo Pat Caffrey

What’s Up in Ultra This Weekend — October 11, 2025

Drew Dinan
Drew Dinan

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The second weekend of October features 71 North American ultramarathons on the UltraRunning Magazine race calendar. In this week’s What’s Up in Ultra, we highlight events in Montana, Indiana, West Virginia, New Hampshire and Alberta, Canada. If you’re a race director and would like your event to be featured in the calendar, register here.

Featured: Le Grizz (Polebridge, MT)

“A Montana tradition since 1982,” the 50-mile Le Grizz Ultramarathon kicks off Saturday, October 11, in Polebridge, Montana, just west of Glacier National Park. A new addition to UltraRunning Magazine’s list of Old School Ultras, the historic race takes place on a rolling gravel road that parallels the North Fork of the Flathead River. Participants will start at the Polebridge Mercantile, head south for a small out-and-back section, and then run north all the way to the Canadian border before turning around and heading back. Race highlights include beautiful fall Montana scenery, the support of incredible volunteers and finish line treats including local beer and fresh huckleberry bear claws. Le Grizz Ultramarathon is powered by The Glacier Institute, the official education partner of Glacier National Park and Flathead National Forest. Read more about the race here.

Other West Events:

Pacific

Mountain

Featured: Indiana Trail 100 (Albion, IN)

The Indiana Trail 100 (100-mile, 75-mile and 50-mile ultramarathons) takes place in the 2,718-acre Chain O’Lakes State Park, just northwest of Fort Wayne, Indiana. The fifth and final stop on the 2025 Midwest Grand Slam of Ultrarunning, Indiana Trail 100 is the state’s first 100-mile race and showcases some of Indiana’s best trails. The 100-milers will have 30 hours to complete four 25-mile loops around the park, with close to 1,500 feet of elevation gain per loop. The 75-mile runners have 23 hours to finish three loops. And 50-mile entrants have 15 hours to tackle three loops. Race proceeds help benefit Chain O’Lakes State Park. Live runner tracking here. Read more.

Other Midwest Events:

Featured: West Virginia Trilogy (Circleville, WV)

The 14th annual West Virginia Trilogy is a three-day stage race held at the  Spruce Knob Mountain Center, a 400-acre outdoor learning campus in West Virginia’s Potomac Highlands. All three days are run on mostly single-track trails through the wild and wonderful Monongahela National Forest. Runners attempting to complete the full trilogy will begin with a 50k on Friday, which features 4,871 feet of elevation gain. Day two sends them off to navigate 8,328 feet of vert over 50 miles. And day three wraps up with a half-marathon and just under 1,500 feet of climbing. Participants can choose to run all three days or any single distance. A pre-race dinner and light breakfast are included with runner registration, but due to the remote location, runners are encouraged to bring everything they need for the weekend. Read more.

Other South Events:

Southwest

Southeast

Featured: Midstate Massive Ultra Trail (New Ipswich, NH)

First run in 2019, the Midstate Massive Ultra Trail (100-mile, 50-mile and 50k ultra distances) features point-to-point trail races that traverse New England’s scenic Midstate Trail in the peak of autumn. All races finish in Massachusetts’ Douglas State Forest, but begin at different sections of the trail. The 100-milers will start at Windblown Camping in New Ipswich, New Hampshire, and have 33 hours to complete their course. The 50-miler runners will set off from Rutland, Massachusetts, and have 20 hours to finish. The 50k participants begin at Howe State Park in Spencer, Massachusetts, and have 9 hours. On course, runners can expect a mix of dirt roads, trails and pavement, with some technical and rocky sections along the way. Read more.

Other Northeast Events:

Featured: Grizzly Ultra (Canmore, AB)

The highly popular Grizzly Ultra is a 50k ultramarathon held in Canmore, Alberta, at the Canmore Nordic Centre, a Provincial Park developed to host the cross-country ski at the 1988 Winter Olympics. Over 1,800 runners will participate in this year’s race as solo competitors or relay runners and attempt to navigate five distinct legs totaling close to 1,600 meters in elevation gain and loss. The challenging race is known for its breathtaking mountain scenery, welcoming community, festive vibe and for requiring you to carry bear spray as grizzly bear sightings are common. In addition to the 50k, Grizzly Ultra also includes a fun costume parade and free kids’ race for youngsters 12 and under. Read more.

Other Events in Canada and Mexico:

Email corys@ultrarunning with questions about adding your event to the UltraRunning Magazine calendar.

Drew Dinan traded the tropics of the Florida Keys for the trails of Bend, OR. Once living the Jimmy Buffett lifestyle, working on fishing boats and owning only a single pair of flip flops, he now has way too many running shoes in his closet and never hears the end of it from his loving wife. He is on a constant quest to find the best happy hours, likes to complain when it’s cold outside, and one day hopes to travel the country writing reviews on chicken wings.

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