The motocyclist who is in his 40's is being treated for leg injuries.
The M6 Northbound is blocked from J24 A58 Liverpool Road (Ashton In Makerfield) to J25 (Bryn).
Congestion to beyond J23 (Haydock).
Traffic is also slowing to look on the opposite side.
It's understood a motorcyclist has come off their bike.
Concern For Missing St Helens Man
52-year-old Paul McDonald also known as Macca, was last seen on Saturday morning.
Police Manhunt After Attempted Robbery In Skelmersdale
Police are appealing for information following an attempt robbery in Skelmersdale.
CCTV Appeal After St Helens Shop Theft
Police have issued a CCTV image of a man who may have information that could assist detectives after clothes were stolen from JD Sports in St Helens.
