A third motorcyclist has been seriously injured in as many hours, on and off the region's roads, this time colliding with a tree at Worrigee, near Nowra.
The rider, believed aged 29, was travelling at about 70kmh when he slammed into a tree off Isa Road, about 3.20pm Friday.
NSW Ambulance paramedics are now treating the man.
The Mercury understands the accident happened as the man was riding a trail bike.
Initial reports indicate he remained conscious thoughout, and has reported loss of sensation to his limbs. He has also suffered limb injuries, and suspected head and chest injuries.
A rescue chopper is expected to land near Worriigee Equestrian Common about 4.30pm.
All three have required retrieval by emergency chopper.