Many arrived at Morisset on Sunday morning to start the 50-kilometre ride in preference to the full 85-kilometre circuit or the easy 16-kilometre route.

For Dallas Barham of Morisset's Breakaway Cycles, one of three mobile mechanics, the entire event was a non stop endurance task.

He was flat out working right through the breaks.

"Most of the problems were gears not working properly and punctures. We ran out of inner tubes," Mr Barham said.

Riders of all classes on bikes of all qualities ensured a top day for the cause.

"We had one rider from the St Ives team who averaged 31 kilometres an hour during the ride, so there were some good riders out there," Loop the Lake co-ordinator Gerry Wild said.

Early estimates indicate the ride raised about $120,000, taking the event's total earnings for the hospital to more than $800,000.

To ensure rider safety the event had route marshals, police cyclists and officers patrolling the route, volunteer motorcycle marshals to support riders in narrow sections, 15 St John Ambulance officers, van marshals and three mobile mechanics.

But not everyone was happy about local streets being inundated by cyclists.

Former occupational, health and safety officer Robert Bain said the event put lives at risk, with riders on narrow roads, sometimes five abreast.

The Cooranbong resident said locals should have received individual notification that their streets were included on the route.