Williams Bay
Trail Running Calendar near Williams Bay 2026-2027
Explore the top trail runs near Williams Bay for 2026-2027! We've gathered 26 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
August 2026
Tough Mudder Chicago on August 29, 2026 at Richardson Adventure Farm offers 5K, 15K and an 8 hour Infinity course with multiple obstacles and a Mudder Village.
September 2026
Echo 136 is a 136-mile ultramarathon on the Ice Age State Trail near Whitewater, WI on Sep 25, 2026, featuring ten aid stations, pacer and crew rules, and a cupless policy.
A 10th annual farm-based 5k trail run and family day in Fort Atkinson, WI supporting A-T research with in-person and virtual participation options.
Timed trail races at Richard Bong State Recreation Area offering 24 hour, multiple 12 hour formats, 6 hour and 3 hour options on September 26, 2026.
October 2026
Trail running and a guided perimeter walk at Rock River Heritage County Park with a timed 5K using chip timing and a heritage celebration with food trucks and live music.
Nature-based out-and-back event in Roscoe, IL offering a 5K run or 2 mile walk on mixed gravel and crushed limestone, starting at Roscoe Middle School and passing a water station twice.
Trail races in Crystal Lake on October 17, 2026 offering 10 mile and 5 mile courses through Veteran Acres and Sternes Woods.
Autumn race at Richardson Adventure Farm in Spring Grove with a 10K, two 5K options including a 250 turn corn maze, and a 1 mile family adventure, plus finisher medals.
October running event at Optimist Community Park in Janesville offering 1 mile and 5K courses with proceeds to Momentum Track and Cross Country Club.
November 2026
A multi-distance trail event in Southern Kettle Moraine State Forest offering ultra distances, a 50K and a 15K Fun Run, with aid stations, pacing rules, finisher awards, and proceeds funding forest projects.
A community running event in Fort Atkinson offering a 12k trail-road course, a 5k neighborhood run, and a 1 mile walk/run with proceeds supporting local and international projects.
A 5K trail run and 2 mile walk at Bristol Woods County Park supporting Pringle Nature Center environmental education, with youth pricing and event shirts.
On 11/14/2026 the Abominable Trail Race at Lake Geneva Ziplines & Adventures offers 5K, 10K, 15K and 30K courses plus 2, 3 or 4 person 30K relays on forest trails, with water stations, race shirt, finisher medal and free action photos.
December 2026
A canicross-focused trail event in Lake Geneva, WI offering a 4-mile loop or two laps for 8 miles, with on-course aid and dog-only podium awards.
January 2027
Winter trail race in Crystal Lake with a hilly single-track 10K loop and a 50K made of five laps, staffed aid stations, finisher medals, and age-group awards.
A winter obstacle race at Lake Geneva Ziplines & Adventures on January 30, 2027 offering distances from a kids loop to a 20K Yeti Challenge; fun heats allow optional obstacles while a competitive division awards cash prizes. All in-person finishers r..
April 2027
Trail races in Crystal Lake, Illinois offering 50k, 15 mile and 5 mile distances on a 5.2 mile loop through single track, prairie and pine forest.