- From - to: Newark to Cotham (Lincolnshire)
- Distance: 5 miles each way
- Terrain: traffic-free disused railway path, tarmac surface
- Current closures/diversions on this route
National Route 15 of the National Cycle Network will connect National Route 6 in Belton, near Shepshed Leicestershire with National Route 1 in Lincolnshire near Coningsby via Nottingham, Grantham and Sleaford. Some small sections are open and signed, although most of the route is still awaiting development.
The route is currently 20 miles long.