An exceptional pen of heavy lambs out of Tullamore has set a new lamb price high at Forbes' Central West Livestock Exchange.

The second-cross, Spring 2024 lambs sold for $454 a head at Tuesday's sheep sale, with a second pen at $449 a head.

Director Matt Lennon from Kevin Miller, Whitty, Lennon and Co said vendor Ross McMahon and family had done an exceptional job preparing these lambs for the market.

They'd been prepared through feedlot at the family-owned operation Ross and his young sons were at the sale to see them reach a record price.

"They'd done an exceptional job on the lambs and presented them the best they could," Mr Lennon said.

It was an exciting day for Forbes, with more than 50,000 head yarded and three pens topping previous price highs.

"It's great for our yards, we're getting stock now from further afield all the time and that only helps," Mr Lennon said.

It was only in June that lamb prices reach $400 a head for the first time at Forbes and expectations for Tuesday's sale were again strong.

Southern sales had seen smaller yardings, but Dubbo and Forbes had bigger numbers coming in, Mr Lennon said.

"Expectations were high, sharping up to the sale everyone thought the job was going to be just as good if not a little bit better," he said.

"Anything with condition is selling really well at the moment."