Trail Running calendar near Fort Atkinson 2026-2027

A long running Wisconsin trail ultramarathon that winds through forests, rocky ridges and glacial landforms. The event offers 50 miles, 50K and a half marathon and typically sells out quickly.

A Last Person Standing ultrarun on a farm near Arena, WI, run on a 1 to 1.25 mile loop with about 250 to 300 feet of climbing per lap. The course changes yearly, reverses every four hours, and continues until one runner remains.

A low-impact, no-frills running event in Delafield, WI that highlights Lapham Peak State Park and raises funds for Tall Pines Conservancy. Races range from a Half Marathon to a free kids 1K.

Experience the spring blooms at Bristol Woods County Park during this hilly trail run and hike. Support local environmental education while navigating scenic dirt paths through the Pringle Nature Center.

Big Climb Wisconsin on May 16, 2026 in Madison is a team-based stadium climb that features stairs, ramps, and concourses. The event honors patients and survivors and awards participants a finisher medal while supporting efforts against bloo..

An out and back on the Badger State and Sugar River rail trails in Belleville, WI on May 23, 2026, offering 50 mile, 50K and half marathon options with aid stations, photos, pizza and beer provided.

Frontline OCR at Byron Motosports Park on May 23, 2026 offers 10K and 5K obstacle courses, a ruck division, a kids mile, Special Forces and Heroes waves, plus team entry packs, organized by a 501(c)(3) foundation.

Dirt Circus Chicago on May 30, 2026 in Crystal Lake, IL gathers the local trail running community for a social run, expo, food, raffle, and vendor booths. Two route options and a city specific t shirt preorder are available.

Backyard Nonsense is a timed trail running event at Richard Bong State Recreation Area on June 6, 2026, offering 3, 6, 12 hour races and two 24 hour formats with group campgrounds reserved and a required Wisconsin State Park pass.

Blue Mound Trail Run on June 6, 2026 in Blue Mound State Park features 10K and 18K trail races on single-track and ski trails, and serves as a fundraiser for Friends of Blue Mound State Park.

Trail race at Hickory Knolls Nature Area in St Charles with 5K, 10K, and a 2 person 10K relay on June 7 2026. The course runs on dirt, grass and gravel paths with marked loops and limited on course water.

An annual June endurance trail event featuring 100 mile, 100k, 50k and 38 mile options on mainly Ice Age Trail terrain. Entry for 2026 is by lottery with an ordered waitlist and early invites for rollovers and volunteers.

Experience an authentic cross country race on a purpose built grass course in Geneva Illinois. Run as an individual or part of a team on this wide professional grade venue featuring rolling terrain and a classic atmosphere.

A Spartan Trail event on a scenic segment of the Ice Age Trail near Rice Lake in Whitewater, WI. Distances include 50K, half marathon and 10K, and the trail terrain ranges from smooth to technical.

Trail 5K and a children's 1/4 mile at Kishwauketoe Nature Center in Williams Bay. The grass trail course passes through hills, woods and prairie, includes a water stop, parking across the street, and awards for top finishers.

A trail running event at Devil's Lake near Baraboo, WI on July 11, 2026, offering distances from 10K to 50 miles, marked courses with aid, post-race food and a finisher medal.

A prairie trail run and walk at Lapham Peak State Forest on July 11, 2026 that raises funds for prairie management, offers awards and shirts for early participants, and includes merchandise, seed sales and on-site food.

A trail 5K at Byron Forest Preserve with chip timing and awards by age group, plus a 1 mile Fun Run with a participation medal. Parking and indoor restrooms are available onsite.

MSRC XC 5k Classic is a cross country race at Verona Area High School on July 12, 2026. It includes a 5k and a 1.6 mile kids race, team scoring for teams of five runners, and awards across multiple age and team categories.

A 10K walk/run on August 1, 2026, through the Nordic Trail System in Kettle Moraine State Forest with water refill stations, trail snacks, a cup-less policy, and donations supporting The Salvation Army.