From Oak House to Bardney Fryer & back! 
A Round trip along part of the traffic free Sustrans NCN Route 1 Water Railway to Bardney to have Fish & Chips at the Lovely Bardney Fryer, at Platform 1 of the Bardney Heritage Centre, before returning to Lincoln back along the Water Railway. It's an 18 mile round trip  (The Fish & Chips make it worth it!) 
Mostly tarmac, some sections are a little rougher as always happens but a largely well maintained path.