Trail Running calendar near Williams Bay 2026-2027

A timed endurance trail event near Willow Springs on a 4 mile loop with single and double track, rolling hills, a signature aid station offering snacks and drinks, and a mandatory reusable cup policy.

A low-impact, no-frills running event on May 16, 2026 in Delafield, Wisconsin offering distances from a 1K kids run to a half marathon, timed by a professional crew with proceeds supporting Tall Pines Conservancy.

A spring trail event at Pringle Nature Center featuring a 5K trail run and a 2 mile fun run or hike through hilly, dirt trails; proceeds support environmental education at the 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..

A chip timed *10K* trail run at The Forge Lemont Quarries featuring mostly crushed limestone surfaces, wooded scenery, competitive overall and age group awards, and a 450 participant capacity.

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.

A multiwave obstacle course at Byron Motosports Park offering 10K, 5K, ruck, and kids divisions, with Special Forces and Endurance competitive formats and team entry packs available.

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.

A timed trail event at Richard Bong State Recreation Area on June 6, 2026, featuring multiple timed options on .75 mile loops around Vern Wolf Lake, marked trails, rolling hills, and hourly on-course challenges.

A trail running event at Saw Wee Kee Park in Yorkville on June 6, 2026. The soft, twisting path is bib timed with staggered starts and is part of a four run series that awards pieces of a 2026 medal and seasonal swag.

A community 5K on June 6, 2026 in Joliet along the Rock Run Greenway Trail with start and finish at Cemeno's Pizza. Proceeds benefit the Pat Clark Cancer Foundation to support local cancer patients and families.

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.

A trail race at Hickory Knolls Nature Area offering 5K, 10K and a 10K two person relay on marked dirt grass and gravel paths; proceeds support the St Charles Park Foundation.

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 race on June 20, 2026 at Rice Lake Nature Trail in Whitewater, WI, using a scenic out and back section of the Ice Age Trail. The route offers three distances and varying trail surfaces from smooth to technical.

Trail races at Wolf Road Woods on June 27, 2026 offer three loop choices covering 3, 6 and 9 miles with varied off-road surfaces, tiered registration fees and post-race refreshments and awards.

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 run and walk at Lapham Peak State Forest on July 11, 2026, raising funds for prairie management; events for adults and youth, first 100 registrants receive a T-shirt and run winners receive awards.

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.