This series can be done from no.1 going uphill to the final cache and then back to the start or the other way round. It starts in Welham Green and crosses fields and through woodland with a bit of road walking in two places. We have seen red kites, buzzards, butterflies, bees, horses but not many people along the well marked footpaths. It is a walk we have done regularly in the Covid-19 lockdown days. You could make it a circle by continuing from no.11 along the footpath past the houses, then along beside Brookmans Park golf course, down to Brookmans Park village centre and back along the pavement to Welham Green where you started.