I went to Riverside State Park and rode the trails for 2.5 hours. In my small backpack I had an Eton Rugged Rukus that I picked up this week. I had my smartphone connected to it via Bluetooth and cranked the tunes during my entire ride. I was very happy with its performance and I think it will be very useful and enjoyable during the 24-hour race next month, especially at night. The trees, rocks, etc., below were serenaded with Arcade Fire, The Scorpions, Foo Fighters, The Killers and more.