Oxford, England (United Kingdom) - "Thames Trail Ultra Marathon". This demanding run along the Thames is one of the most popular events in the British ultra running calendar. Previously known as the Thames Trot, the event takes in 48 miles from Iffley in Oxfordshire to Henley-on-Thames. Our runners will enjoy the company of England's largest river as it makes its way past ever-changing scenery, beautiful houses, and traditional rowing clubs. Expect everything from tarmac paths to muddy trails on this interesting and challenging course. The run follows both the Thames Path and Ridgeway National Trails, so entrants should be careful not to forget the words "National Trail" rather than simply reading "Thames Path." Starting around three miles south of Oxford, the race heads from Hawkwell House Hotel down to Iffley Lock and across the river. It then follows the towpath through the picturesque towns and villages of the region to Henley-on-Thames. The race finishes at the YMCA Y Centre, in Lawson Road, Henley-on-Thames. www.gobeyondchallenge.com/ultra-marathons/thames-trail-ultra