The SPAM winter challenge is a mountain bike enduro that’s held on MOD land near Erlestoke. There’s a choice of 25,35 and 50km routes (16,22 and 31 miles respectively).
According to SPAM the route isn’t overly technical and you can take it as fast or as slowly as you like.
Bertie Maffoons bike shop will be there as well as Finely Tuned Ride for servicing.
See the SPAM Winter Challenge website for more information.