There are several races taking place at the Goodwood Motor Circuit where each lap is said to be around 4km. I’ve yet to participate in one of these races but have signed up for the Marathon in February so will be able to offer more feedback once I’ve completed that.
It looks like a well organised event with a good atmosphere and excellent support. There are some benefits of doing a lapped course included more regular access to toilets and water.
It’s a good surface to run on with very little elevation. I’ve know a few local runners that have achieved Good for Age times here at Goodwood to earn a spot in the London Marathon later in the year.