Just to clarify the slight sidetrack, Trailquests are not construed as races as they do not rank the competitors in terms of speed, there is a fixed time allowed and competitors are ranked in order of the value of the checkpoints visited in that time. Re the FC, it’s a bit rough charging you for just going through their(our) land, I organised TQ’s in Mid Wales for 8 years and was never charged other than for use of visior centres. The issue might be if they decide to get arsey, how can you control how the riders get to the checkpoints on bridleways, if there is a muddy overgrown BW or a slightly longer forest road then riders will choose the latter, unless you put them out of bounds then you need to police this. The Sustrans issue is complex, irrespective of whether there is a ROW, I would always consult the landowner if crossing their land, who knows, a farmer may choose that day to dip sheep along side the trail and dozens of riders using usually deserted trails may cause issues. Welcome to the world of event organisation.