There are hundreds of trig stations across Sydney’s north and north-west, from remote parts of national parks to suburban locations. You might be surprised to find a trig point hidden away in your suburb! Some of the best-preserved trig stations are easily reached near residential developments.
Historical trig stations in Sydney’s North explores the 80-odd trig stations built in the 1880s and the history of trigonometric surveying to the north of Sydney.
For some of the more challenging-to-reach trig stations, have a look at:
Hidden in thick scrub near Mona Vale Road in Ingleside, only the stone cairn of the Addison Trig remains.
- Serial number: TS594
- Elevation: 200m
- Follow foopath along Mona Vale Road from Addison Road (Ingleside)
- 33°41'11.4"S 151°15'30.7"E
Just a few rocks remain of the Allison Trig Station; the post and vanes have disappeared.
- National Park: Ku-ring-gai Chase NP, North (Mt Krg to Brooklyn)
- Serial number: TS620
- Elevation: 196m
- Bush-bash from Ku-ring-gai Chase Road
- 33°40’17.0″S 151°08’33.7″E
The Arden Trig Station is on a spur off the Waratah Track. Great views from the trig and nearby.
- National Park: Ku-ring-gai Chase NP, West Head
- Serial number: TS638
- Elevation: 191m
- Start of Waratah Track (West Head)
- 33°38'02.9"S 151°15'03.4"E
The Arthur Trig Station is stil in pretty good condition; it is located just off the Mount Murray Anderson bushwalking track.
- National Park: Duffys Forest & Terrey Hills, Ku-ring-gai Chase NP
- Serial number: TS649
- Elevation: 198m
- Rough (unmarked) track off Perimeter Trail, which starts at end of Bulara St (Duffys Forest)
- 33°38’53.5″S 151°11’47.5″E
Probably the most unusual trig station in Sydney, the Bahai Temple is an officially recognised trigonometric point, which is visible from a long way away.
- Serial number: TS679 R
- Elevation: 240m
- Entrance at 173 Mona Vale Road, Ingleside
- 33°41'07.8"S 151°15'31.1"E
The Bairne Trig Station is reached by a somewhat challenging scrub-bash from the Bairne Track No views, but there is a nearby Aboriginal engraving site.
- National Park: Ku-ring-gai Chase NP, West Head
- Serial number: TS681
- 33°36'50.8"S 151°17'10.0"E
There’s no trace left of the Barbara Trig Station, which would have been just off Depot Road, near the National Parks and Wildlife Service Depot in Mount Colah.
- National Park: Ku-ring-gai Chase NP, North (Mt Krg to Brooklyn)
- Serial number: TS734
- Elevation: 209m
- Depot Road (no car access) from Ku-ring-gai Chase Road.
- 33°40’35.8″S 151°07’14.9″E‘
The Barrenjoey Trig Station is hidden in thick bush not far from the Access Trail up to Barrenjoey Head. There’s a nice from the trig, which was the location of one of the original lightstations.
- National Park: Barrenjoey, Ku-ring-gai Chase NP
- Serial number: TS7220
- Elevation: 104m
- Track from end of Palm Beach carpark (Governor Phillip Park)
- S33° 34.758′ E151° 19.716′
A trig point embedded in the ground, with a trig pin inside a metal box.
- Serial number: TS832
- Park at end of Staley Circuit (cul de sac) in West Pennant Hills
- 33°44'19.3"S 151°01'58.4"E
Located on top of a water reservoir in Berowra, the Berowra Reservoir Trig can only be seen from the road below.
- Serial number: TS878 R
- Elevation: 248m
- On top of reservoir next to Berowra Waters Road (Berowra)
- 33°37'12.8"S 151°08'53.4"E
One of two trig stations on Blue Fish Point, the Blue Fish 1 trig is located right on the edge of the cliff below a WWII radar installation.
- National Park: Sydney Harbour National Park
- Serial number: TS10751
- Elevation: 65m
- Informal walking track from Bluefish Drive
- 33°48'30.1"S 151°18'23.5"E
Not far off the Bobbin Head Trail is the Bobbin Trig Station. It’s partly demolished, although much of the stone cairn remains.
- National Park: Bobbin Head, Ku-ring-gai Chase NP
- Serial number: TS1013
- Elevation: 185m
- Bobbin Head Trail from from Bobbin Head Road or Bobbin Head
- 33°40'12.7"S 151°09'42.1"E
Boundary Trig is in good condition and is relatively easily reached - but doesn't have any view or offer any compelling reason to visit...
- National Park: Garigal National Park
- Serial number: TS1100
- Elevation: 189m
- Just off Mona Vale Road in Belrose
- 33°42'27.2"S 151°12'12.1"E
Just the concrete plinth remains of this trig station, which is only a few metres off the Carrol Trig Firetrail.
- National Park: Garigal National Park
- Serial number: TS1421
- Elevation: 165m
- Next to 97 Sir Thomas Mitchell Drive, Davidson
- 33°44’04.8″S 151°11’15.6″E
Castlecrag Trig is a metal plug and arrow carved in sandstone, on top of a rock outcrop in Castlecrag.
- Serial number: TS10293
- From Tower Reserve, Castlecrag
- 33°47'59.4"S 151°13'16.1"E
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