1911

O'Reilly boys select land on the McPherson Range to establish dairy farms.

1914

Stockyard Creek Track is constructed as the main access to the mountain. First visitors to the area stayed in the O'Reilly slab huts.

1915

Lamington National Park is proclaimed.

1919

Herb, Luke, Mick and Bernard appointed as honorary rangers. Mick O'Reilly appointed working overseer of the Park becoming Queensland's first national park ranger.

1925

Tom O'Reilly initiates the building of the Guesthouse.

1926

O'Reilly's Guesthouse welcomes its first guests for Easter.

1930

Mick and new bride Annie leave to establish farm at Conondale.

1935

Laheys Ltd, build a road up the mountain to the edge of the National Park, reducing the horseback journey to four miles.

1937

Bernard O'Reilly finds the lost Stinson aircraft and saves the lives of two survivors.

1944

Mick and Annie O'Reilly return with sons Vince and Peter.

1946

Mick is appointed Guesthouse Manager on a salary of £4 a week.

1947

Landslides close the road for 4 weeks forcing a return to horses and the Stockyard Creek Track. Regular bus service to the Guesthouse commences.

1948

Mick organises a share buy-back and privatises the company.

1951

Mick and Anne complete their house, including the Green Mountains Store.

1953

A slaughterhouse is built near Morans Creek and cattle are killed here at least once a week. (This continues for the next 25 years).

1955

St. Joseph's Church is moved to the mountain from Gleneagle. Bernard and Viola leave the mountain to open Lost World Guesthouse.

The Second Generation

1957

Vince and Peter become directors of the company. Driest year (858mm) since records began in 1917.

1961

Peter marries Karma England and Vince marries Lona Murphy.

1967

O'Reilly's is connected to mains power.

1968

Land Rovers are bought to cater for the needs of the older guests. The Green Mountains School opens in Hut 2.

1974

Wettest year on record (3767mm).O'Reilly's frequently being isolated due to floods.

1975

Bernard O'Reilly passes away. Queensland National Parks and Wildlife Service is formed. O'Reilly's first 4WD bus, ‘Bertha' is purchased.

1977

A large building project includes construction of a reception area and office, lounge, games room and six family units. Green Mountains Natural History Association (GMNHA) formed.

1978

A radio telephone link replaced the Duck Creek party line. The first three kilometres of the road out from the Guesthouse was sealed. Water supply moved from Morans to West Canungra Creek. First O'Reilly's Bird Week.

1979

Mick O'Reilly passes away (May). Mick's wife Anne passes away (September).

1980

Duck Creek Road (4WD Road) is constructed.

1984

The Rainforest Room, O'Reilly's first bar, opens.

1987

The Tree Top Walk is completed.

1989

Joe O'Reilly passes away, the last of the first O'Reilly generation on the mountain.

The Third Generation

1990

Final closing of the big Reservations book with the move to computers.

1991

Sealing of Lamington National Park Road completed.

1992

Lightning strikes the Lone Pine, O'Reilly's ‘Home Tree'.

1994

A year of severe drought.

1996

Vince O'Reilly retires. Karma O'Reilly passes away.

1998

Peter O'Reilly retires.

1999

O'Reilly's Canungra Valley Vineyards opens.Vince O'Reilly passes away.

2000

O'Reilly's largest building project including 21 guest rooms, relaxation centre, and new staff accommodations is completed.

2001

O'Reilly's Guesthouse celebrates its 75th anniversary.

2003

Vince and Lona's house is remodelled and converted into two luxurious Two Bedroom Canopy Suites.

2005

90th Anniversary of Lamington National Park being declared.

2006

O'Reilly's Guesthouse celebrates its 80th anniversary.