Welcome to the Loud Thunder 50 presented by the Quad Cities Trail & Ultra Runners - (QC-TUR) and Sun Trail Running! 
Please join us for 50mi, 50k and 1/2 marathon trail races on the rugged, beautiful and challenging trails at Loud Thunder Forest Preserve along the mighty Mississipppi River. 

Our hope is to showcase this amazing park all while providing a low key trail race experience for those looking for a challenging but rewarding late spring ultra. Our commitment is to provide the highest value event possible by keeping the cost low and the focus on the runner, the trails and this great outdoor community. Your registration fee covers all the race basics as well as custom swag, fully stocked aid stations, custom finisher awards, post-race food and drink and a guaranteed donation back to the park to help ensure future maintenance and conservation efforts. 

As you can expect with races of this nature, distances won’t be exact but will be pretty close to advertised. Trust us; you’ll get your money’s worth! The race course is 13.3 miles and is primarily a loop format with a few short stretches of 2-way traffic. These 2-way sections will be a great opportunity to encourage and commiserate with your fellow runners! 50mi runners will run the full route 3x before finishing with a shortened 4th loop. 50k runners will run the full route 2x and finish with a shortened north loop.