Lace up for an unforgettable trail experience at the Loud Thunder 50, taking place on Saturday, April 18, 2026, in Illinois City, IL. Hosted by Sun Trail Running, this "brutiful" event offers challenging distances of 50 miles, 50K, and a Half Marathon, all set within the rugged and scenic Loud Thunder Forest Preserve along the mighty Mississippi River. Runners can expect typical race day conditions with highs around 62F and lows near 39F, with a minimal 15% chance of precipitation.

The course is renowned for its diverse and demanding terrain, consisting of approximately 95% dirt single and double track, interspersed with short sections of grass and crushed gravel. You'll navigate a 13.3-mile loop format that boasts an incredible variety of topography, featuring "bombable descents" and "lung-burning climbs," alongside runnable stretches. Prepare for significant elevation gains: the 50-mile race accumulates roughly 6,600 feet, the 50K tackles about 4,000 feet, and the Half Marathon gains around 1,900 feet. Throughout your journey, you'll be treated to beautiful views of both the Mississippi River and Lake George.

The Loud Thunder 50 prides itself on providing a high-value, low-key trail race experience, prioritizing the runner and fostering a strong community atmosphere. Two fully stocked aid stations are strategically placed on the course, with the longest stretch between them being less than 5 miles, ensuring ample support. Both aid stations accommodate drop bags and crew access, and pacers are permitted for the 50-mile event during the final 18 miles. The start/finish area at the Horse Corral Campground offers convenient camping options, immersing participants in the race environment. This challenging yet rewarding ultra promises not just a race, but a memorable adventure with custom swag, finisher awards, and post-race refreshments.