Sandy to Biggleswade or Circular walk
Greensand Ridge Walk along grassy tracks, woodland trails, and 2 pretty villages with pubs - Northill and Old Warden
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Another local 12 miler for this walker on a fairly decent June day. The walk is mainly flat, and, for the most part, follows the Greensand Ridge Walk, initially. There's a mix of broad, grassy tracks along field edges and woodland trails. If you're lucky, you might even get a glimpse of the 'Airlander 10', housed in it's nearby Cardington hangar.
Another surprisingly decent walk.