Trail Running calendar near Williams Bay 2025-2026

Run 10K, 25K, 50K or 50 Miler loops at Deer Grove Forest Preserve West in Palatine. Mostly wide non technical trails, a single aid station, pacers allowed for 50 Miler after four loops, and on course shenanigans promise a fun day.

Run under the stars at Moonlight Meltdown on April 25 in Belgium WI, with chip timed 5k road and a Sunset Safari 10k including a trail through Harrington Beach State Park. Shirts, post race food and a finish party at KYOTES.

Run rolling prairie, single track and sandy hills at the Donald Dash in Donald County Park near Mount Horeb, WI. Choose 5 km or 15 km and support Friends of Donald Park as proceeds fund trail upkeep.

Run scenic trails at Teason's Woods in Palos Hills on May 9, 2026 with marathon or 10 Mile options over rolling terrain and shared two way trails. Enjoy event apparel, a wooden sunflower medal for finishers, plus post race chili and beer.

The Wisconsin Trail Series will take place in Oconomowoc on Sunday 10 May 2026. You can run between 5 and 10 kilometers.

Join the Sugar Badger 50/50 and Half in Belleville, WI for flat, scenic out and back runs on the Badger State and Sugar River State Trails with 50 mile, 50K and half marathon options. Expect trestle bridges, a quarter mile tunnel, aid stati..

Kettle Moraine returns June 13 and 14 2026 in LaGrange Wisconsin, offering 100 mile, 100K and shorter trail distances with plenty of Ice Age Trail scenery. The 100 mile serves as a Western States qualifier, making this a prime summer ultra.

The Wisconsin Trail Series will take place in Oconomowoc on Sunday 14 June 2026. You can run between 5 and 10 kilometers.

Take on rolling hills and changing trail footing along a scenic Ice Age Trail section at Rice Lake Nature Trail in Whitewater, WI on June 20, 2026. Choose 10K, half marathon or 50K for a rewarding summer trail challenge.

The Wisconsin Trail Series will take place in Oconomowoc on Saturday 27 June 2026. You can run between 5 and 10 kilometers.

The Wisconsin Trail Series will take place in Oconomowoc on Saturday 1 August 2026. You can run between 5 and 10 kilometers.

Tackle rugged trails at the GristMill Grind in Franklin Creek State Natural Area, featuring 5K and 10K routes with creek crossings, bluffs and forest canopy. All proceeds support Franklin Creek conservation and park improvements.

The Wisconsin Trail Series will take place in Oconomowoc on Saturday 19 September 2026. You can run between 5 and 10 kilometers.

The Echo 136 is a 136 mile trail ultramarathon through the scenic Kettle Moraine and Ice Age State Trail near Whitewater, Wisconsin on September 25, 2026. Expect rugged singletrack, generous aid stations and a 55 hour time limit.

Take in wooded trail views at the Fall Into Fall Trail 5k in Janesville, then stay for live music, food trucks and beer and wine tasting at the festival. Run or walk a fun, scenic course and celebrate the season with community festivities.

Join the Haunted Highlander Assault Trail Run in McHenry on October 3, 2026 for spooky 5 km heats through haunted sets and animatronics. After the run enjoy a costume contest, bonfire, live entertainment and food.

Enjoy a fall run, walk and roll through 125 acres of prairie, ponds and fall color at Zachariah's Acres in Oconomowoc. Choose 5K, half marathon or a family one mile loop while supporting nature based programs for children with special needs..

Join the Jaimie Cox Memorial Run in Roscoe IL on October 17, 2026 for a family friendly 5K or 2 mile walk along the scenic Stone Bridge Trail. Run for a cause as proceeds support the Jaimie Cox Memorial Scholarship.

The Wisconsin Trail Series will take place in Oconomowoc on Saturday 17 October 2026. You can run between 5 and 10 kilometers.