The Hurtwood 50 starts from the pleasant town of Dorking, and follows the Greensand Way into the forested Surrey Hills, an Area of Outstanding Natural Beauty.  This race is essentially an out and back, with a loop off the Greensand Way before starting the return journey.  The race takes you up and over Leith Hill, Holmbury Hill and Pitch Hill on a well marked, easy to follow trail through the woodlands, ridgelines and valleys of this area that is collectively known as The Hurtwood.