I decided that the chance to run on the famous Silvestone track was too good to miss and opted for the half marathon distance - 5k and 10k also available. There was a mass startwith runers of all distances mixed in together, which seemed a bit strange, but worked well. The course zig-zagged and spiralled on and off the main track, through the pit lanes and back around in lots of looped, creating a very picturesque Strava track! All turns were well signed and marshalled and there was little chance of getting lost. Very worth doing, if you like your motorracing.