Here’s a longer Downe route to follow; double the length of the existing Downe walk at 4.2 miles, so a pleasant 90-minute walk. See, download pdf or use GPX track from this page

It can be viewed on the GPSies site where a GPX track is available for you to download and follow on your smartphone (to get your real-time location tap the bottom-most button on the left of the screen).

The route starts and finishes at the same locations as the original Downe walk. The extension misses out on the lovely fields by Charles Darwin’s garden (although they are an easy detour away) and the Sandwalk but gains the superb ancient woods of Blackbush and Twenty Acre Shaw Woods with its superb April bluebells then orchids and gentians.

Ancient woods: Blackbush and Twenty Acre Shaw

Yesterday the trees were rich with the calls of song thrush, chaffinch and wrens (so loud… and weird!). A sharp thundery looking storm slipped by to the south, on its way to Tonbridge and Sevenoaks (pictured). After the woods the walk joins the valley on the eastern border of the historic Biggin Hill airfield. Hedgerows, giant beeches and wild meadows make this a really rich looking habitat for flora and fauna; yesterday I saw nuthatches, greater spotted woodpeckers and a wonderful large tortoiseshell butterfly. Full description of walk here, but the GPX track should get you round easily enough. 

Next walk to be added to this site: Knockholt Pound/Chevening circular. By end of June.