Two hundred kilometres is an awful long way for a carton of beer and a roll of toilet paper.

Key points: Lake Eyre is currently experiencing one of its biggest flooding events in living memory

Lake Eyre is currently experiencing one of its biggest flooding events in living memory The town of Mungerannie is along the Birdsville Track, an unsealed stretch of road, part of which is currently closed because of floods

The town of Mungerannie is along the Birdsville Track, an unsealed stretch of road, part of which is currently closed because of floods While the floods have been good news for many, the closure means its been an unusually quiet season for the Mungerannie pub

But for Phil Gregurke, that is just how it is now that floodwater heading to Lake Eyre has closed one of outback South Australia's arterial roads.

Mr Gregurke owns and operates the Mungerannie Pub, the only place to have a beer, a chicken schnitzel and game of pool between Marree and the Queensland border.

More than 800 kilometres north of Adelaide, Mungerannie is along the Birdsville Track, an unsealed stretch of road, part of which is currently closed because of floods.

Green new growth is seen on land around Lake Eyre in northern South Australia. ( ABC News: Brendan Esposito )

The road connects Marree in the south to Birdsville in the north.

"Everybody that does get stuck here, eventually they all want to leave and it's a bit of a nuisance when people are stuck here," he said.

"Usually it's only for two or three days at the maximum and we make our own fun.

We go out and play golf, we go play in the puddles, we all sit around and have a few quiet drinks, some silly card games."

There is no one stuck at the pub this time, because the road south of Mungerannie was recently reopened.

No delivery for months

Floodwater has closed the Birdsville Track north of Mungerannie.

It means Mr Gregurke's normal supply truck has not run in months, causing him to travel to Marree, 200 kilometres away, for all the pub's supplies.

"We haven't had a delivery here for four months," he said.

"Because it's not worthwhile for the transport company that brings it up just to us.

The Birdsville Track during a flood event in 2011. ( ABC News: Paul Lockyer )

"It's just not worth his while, where normally he would go straight to Birdsville."

Mr Gregurke said the floodwater has made it a slow start to the season.

"At Easter, normally we would have four people here at the pub working," he said.

"At the moment, it's just the one and I don't expect anybody here until the end of next week.

"They've opened the road probably a week too early for me."

Massive flood event

The floodwaters are causing one of Lake Eyre's biggest filling events in living memory.

William Creek is the town closest to the outback salt pan and sees tourists from all over the world visit the tiny town.

William Creek publican Trevor Wright said he has not seen a flood event like this in decades. ( ABC News: Gary-Jon Lysaght )

Local publican and pilot Trevor Wright said this year's flooding is the biggest he has seen in decades.

"It's not normal and I think having that follow up with that initial water going into the lake and the greening along the Channel Country has made a difference," he said.

"We're just noticing the temperatures are starting to drop, the evaporation rate will decrease so we should see much greater amounts of water staying in the lake for longer."

William Creek is along the Oodnadatta Track, another unsealed arterial road in outback South Australia.

While flood events are less likely to close this Track, Mr Wright said other tracks have not fared as well.

Pelicans rest on the banks of Lake Eyre. ( ABC News: Brendan Esposito )

"You've got to remember that this water flowing into the Lake is coming down through the Channel System, the big ones that it has had the effect on is the Birdsville, coming up the Birdsville Track," he said.

"Hopefully that track will be open in the near future and also for people going across the Simpson Desert with the Eyre Creek actually flooding there and making it impassable."