Loud Thunder 50
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Loud Thunder 50
The Loud Thunder 50 is a trail race event on April 17, 2027 at Loud Thunder Forest Preserve near Illinois City, IL, organized by Sun Trail Running. Distances offered:
- 50 mile
- 50K
- half marathon
The course is primarily a loop format based on a single full loop of about 13.3 miles. Runners will complete multiple loops depending on distance. The surface is about 95% trail, including dirt single and double track, with short stretches of grass and crushed gravel and minimal pavement. Approximate elevation gain is listed as ~6600 ft for the 50 mile, ~4000 ft for the 50K, and ~1900 ft for the half marathon.
Two fully stocked aid stations are on course; both allow drop bags and crew access. The longest distance between aid stations is under 5 miles. Pacers are permitted only for the 50 mile and only for the final roughly 18 miles. Crews have space at parked vehicles and at a greenspace near the start/finish aid station.
Camping is available at the Horse Corral Campground at the start/finish and at other park campgrounds, including one adjacent to an on-course aid station. Registration is online only; there are no paper or race morning registrations. The event does not offer refunds or bib transfers. A deferral policy and a waitlist are maintained with specified deadlines and procedures. Visit the organization's website for the most recent information.
