Trail Running calendar near Williams Bay 2025-2026

The Frozen Assets 5K Run/Walk, organized by Clean Lakes Alliance, invites participants to experience a unique running event on the frozen surface of Lake Mendota in Madison, Wisconsin. This event features both a chip-timed 5K and an untimed walk, allowing individuals of all ages to join in the fun...

The Tour de Trails is an exciting running event organized by the Rockford Road Runners, featuring both a 9-mile and a 12-mile race. Scheduled for February and March 2025, this event invites runners of all levels to experience the scenic trails of Rockford. Participants can enjoy a well-organized rac..

ARKTOS is an ultra-running event taking place in Dousman, Wisconsin, from February 22 to 23, 2025. The event features various challenges, including 6-hour, 12-hour, and 20-hour races, available for both solo runners and relay teams of up to four participants. The race is capped at 160 runners, empha..

The Bald Unyielding Twilight Trail Trial is an exciting ultra-running event taking place at the Bald Hill Prairie Preserve in Mount Morris, Illinois. Scheduled for February 22-23, 2025, this unique race features timed segments of 3, 6, and 12 hours, allowing participants to test their endurance in t..

The Muddy Shamrock @ The Forge is an exciting trail running event taking place in Lemont, IL, featuring a Trail Half Marathon and a Trail Quarter Marathon. Scheduled for March 15, 2025, this fourth annual race promises a challenging course through scenic wooded trails, including single and double-tr..

The Skunk Ape 806/314 Trail Race is a unique running event taking place on March 22, 2025, at Lowell Park in Dixon, IL. Participants can choose between two challenging distances: 33.75 miles to be completed in 8 hours and 6 minutes, or 13.5 miles in 3 hours and 14 minutes. The race features a 2.25-m..

The Trailbreaker is an annual running event held in Waukesha, Wisconsin, since 1993, featuring a variety of races including a Marathon, Half Marathon, 10K, 5K, Walk, and a Kiddos 1K. Organized by the Park Foundation of Waukesha, the event serves as a fundraiser to enhance local parks and recreation..

The Sunset Safari 10k Trail Run is part of the 12th Annual Moonlight Meltdown event, taking place in Belgium, Wisconsin. This hybrid/crossover trail run offers participants a scenic experience through Harrington Beach State Park, featuring a 1.2-mile stretch on a snowmobile trail. The event is organ..

The Earth Day 50K/15 Mile/5 Mile event, taking place on April 26, 2025, in Crystal Lake, IL, offers participants a choice of three race distances. The course features a scenic 5-mile loop through single track and rolling hills, designed to challenge runners while promoting a landfill-free environmen..

Childish Nonsense is a whimsical running event taking place at Deer Grove Forest Preserve in Palatine, IL. Participants can choose from various distances, including a 50 Miler, 50K, 25K, and 10K, all set on a wide, non-technical trail. The event emphasizes community and inclusivity, offering free en..

The Prickly Pine Jackpot 24 Hour Solo/Relay is an exciting long-distance running event taking place in the scenic Kettle Moraine State Forest. Participants can choose from various race formats, including a 6-hour, 12-hour, 24-hour solo, and a 4-person relay. The course features three unique loops of..

The Donald Dash Trail Run is an exciting running event taking place in Mount Horeb, Wisconsin, featuring two race distances: a 5K and a 15K. Designed to cater to both novice and experienced runners, the course includes a mix of prairie, single track, and hills, providing a challenging yet enjoyable..

The Great Western Half-Marathon & 10K, organized by the Fox River Trail Runners, is a well-established running event held on the scenic Great Western Trail. Celebrating over 25 years, this competitive race features a flat, out-and-back course, making it accessible for runners of all levels. Schedule..

The F^3 Cap Sauers Trail Marathon & 10 Mile is set to take place in Palos Hills, IL, on May 10, 2025. This event features a challenging marathon and a 10-mile race, both traversing the scenic Cap Sauers Holding Nature Preserve, the largest undeveloped area in Cook County. Participants will experienc..

The Chicago Yeti 7-11 Hour Endurance Run is a unique trail running event that combines endurance, camaraderie, and a fun atmosphere. Set in Willow Springs, Illinois, participants can choose between 7-hour and 11-hour races on a scenic 4-mile loop through the Palos Preserves. The course features a mi..

The Sugar Badger 50/50 and Half is a scenic running event taking place in Belleville, Wisconsin, featuring a 50-mile, 50K, and half marathon distance. The race is set on the flat and soft rail trails of the Badger State Trail and the Sugar River State Trail, offering picturesque views, trestle bridg..

Bong Backyards is an exciting trail and ultra running event scheduled for June 6, 2025, at the Richard Bong State Recreation Area in Brighton, WI. This event caters to runners of all skill levels, offering multiple race distances, including the challenging Backyard Ultra and the shorter Backyard 24...

The Kettle Moraine 100 Endurance Races is a premier ultra marathon event held annually in June, featuring a variety of race distances including 100 miles, 100 kilometers, 50 kilometers, and 38 miles. Established in 1996, this trail race showcases the scenic beauty of the Kettle Moraine State Forest,..

The Whitewater Trail Challenge is a scenic running event taking place on June 21, 2025, in Whitewater, Wisconsin. Participants can choose from three distances: a 10K, a half marathon, and a 50K, all set along the iconic Ice Age Trail, which spans 1,200 miles across the state. The course features a m..

The Sunburst 12 Hour Trail Festival, taking place on June 21, 2025, at Sunburst Ski Area in Kewaskum, WI, offers both 6 and 12-hour solo and relay running events. Participants will navigate a challenging course featuring scenic trails and significant elevation changes. Runners will receive a golden..