Welcome to the inaugural Loud Thunder 50 presented by the Quad Cities Trail & Ultra Runners! Please join us for a 50mi and 50k trail race 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. Anyone that has ran any of our races know that we take value seriously and the runner experience is our top priority. 

As you can expect with races of this nature, distances won’t be exact but will be pretty close to 50 miles and 50k. 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 the 8ish mile north loop. 50k runners will run the full route 2x and finish with a shortened north loop.


50 Miles View course top times

Date Finishers Top Result Top Result (F)
04/17/21 15 8:05:48 8:42:51
04/18/20 Race Cancelled

50 KM View course top times

Date Finishers Top Result Top Result (F)
04/17/21 36 4:54:05 5:21:58
04/18/20 Race Cancelled
We try to keep the most accurate information about this race, but changes do happen. Always visit the official race website for the most up to date information. If you see an error, please let us know


  • Jun 13, 2021
  • Lloyd Harbor, NY
50 KM