Premium Content Subscriber only Rockhampton Harley Owners Group will introduce two-wheelers to Rocky Nats in 2021, as part of the groupâs 30th year celebrations. The Rocky HOG chapter will host the state rally this year for the first time since 2009, at which time more than 1000 riders turned out. The rally includes a series of planned rides for smaller groups, a Thunder Run for all motorcycles, and entertainment over a couple of days. Rockhampton Harley Owners Group at the beach Motorcycles will also be incorporated into the Rocky Nats event - billed as âthree days of high-octane automotive awesomenessâ - in Rockhamptonâs CBD.