| Road Photos & Information: South Australia |
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Mount Barker Road, Strathalbyn Road, Aldgate-Strathalbyn Road, Adelaide Road, Angus Road, Venables Street & Macclesfield Road (Angas River Scenic Drive) (B33) |
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Statistics:
- Length: 37 km
- Northern Terminus: South Eastern Fwy (M1), Stirling
- Southern Terminus: Adelaide Road (B37), a few kilometres north of the Strathalbyn town centre.
- Suburbs, Towns & Localities along route: Stirling, Aldgate, Mylor, Biggs Flat, Echunga, Flaxley, Macclesfield and Strathalbyn.
Route Numbering:
- Current:
- Multiplexed with:

- Former:

General Information:
B33 is a generally north-south route traveling from the Adelaide Hills to Strathalbyn which is centred between the Fleurieu Peninsula and the large Lake Alexandrina, at the mouth to the Murray River. The route is mostly rural road and some suburban road closer to Adelaide, but all 2-lane, single carrigeway
The Mt Barker Road (former Princes Hwy) segment of B33 was once part of National Route 1, and the main route from the eastern states to Adelaide.
Both the towns of Stirling and Algate date back to the mid 1800s.
History:
- 1938: Princes Highway named, covering B33 from Stirling to Aldgate
- 1955: National Route 1 introduced to the Stirling to Aldgate section
- 1970s: Stirling and Aldgate by-passed by South Eastern Fwy, revocation of NR1 between Stirling and Aldgate
- 1998: Introduction of B33 route number

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Echunga Town centre:
Approaching Churchill Rd in Echunga. October 2004.
Image © Darrin Smith |
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AD Sign:
Advance directional sign approaching the intersection with Churchill Road. October 2004.
Image © Darrin Smith |
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RD Sign:
Distance sign as you head northwest from Echunga, October 2004.
Image © Darrin Smith |
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Distance Sign:
RD sign as you head southeast on Angus Road at Echunga. October 2004.
Image © Darrin Smith |