The Skull 120/60/30 Gravel Grind highlights Harney County, Oregon’s rugged character, from long mountainous ascents to teeth-chattering and eye-watering descents, to breathtaking vistas, open rangeland and alpine forests. With two stream crossings and cattle guard after cattle guard, this gravel grind is a feat to finish and a testament to the rider’s grit and determination. The Skull 120 ...