Get ready for a laid-back 36-hour running adventure along Casper's scenic Platte River Trail! This self-supported, no-entry-fee event kicks off at 6pm on September 25th and runs through 6am on September 27th, with participants tackling a 3-mile out-and-back loop as many times as they can—or 33 times if they're gunning for 100 miles, with an optional 1-mile bonus loop to cross the finish line. Just register by September 24th at runsignup.com, be at least 18 years old, and come ready to run with a maximum of 10 friendly competitors on this intimate, self-reliant challenge!