page_title: Ontario Highway 17
section_title: Sudbury to Arnprior
hierarchical_section_title: Ontario Highway 17 / Route description / Sudbury to Arnprior
caption_attribution_description: Highway 17 between Desbarats and Echo Bay, Ontario, Canada
context_page_description: King's Highway 17, more commonly known as Highway 17, is a provincially maintained highway and the primary route of the Trans-Canada Highway through the Canadian province of Ontario. It begins at the Manitoba boundary, 50 km west of Kenora, and the main section ends where Highway 417 begins just west of Arnprior. A small disconnected signed section of the highway still remains within the Ottawa Region between County Road 29 and Grants Side Rd. This makes it Ontario's longest highway.
  The highway once extended even farther to the Quebec boundary in East Hawkesbury with a peak length of about 2,180 km. However, a section of Highway 17 "disappeared" when the Ottawa section of it was upgraded to the freeway Highway 417 in 1971. Highway 17 was not re-routed through Ottawa, nor did it share numbering with Highway 417 to rectify the discontinuity, even though Highway 417 formed a direct link between the western and eastern sections of Highway 17. However, from East Hawkesbury to Ottawa, Highway 17 retained the Trans-Canada Highway routing and signs until it met up again and merged with Highway 417 until 1997 when Highway 17 through Ottawa was downgraded.
context_section_description: Highway 17 passes to the south of the urban centre of Sudbury. It meets Highway 69 at an interchange. At this interchange, the Southwest and Southeast Bypasses meet, and for just over a kilometre, Highway 17 is a divided four-lane freeway.
  The Super 2 continues northeast to meet the original alignment of Highway 17 east of downtown Sudbury. Here it turns east and travels through the city's outlying neighbourhoods of Coniston and Wahnapitae; a new freeway alignment of this route is currently in the planning stages.
  The highway route passes through the rural municipalities of Markstay-Warren and West Nipissing before reaching North Bay, where it follows an undivided four-lane expressway alignment, with reduced but not full control of access, through the city of North Bay; as of 2012, early preparations have taken place for a freeway conversion and realignment of this segment. For 4.1 kilometres from Algonquin Avenue to the Twin Lakes area, the route is once again concurrent with Highway 11. At the northern end of this concurrency, Highway 11 travels north and wraps westward and south to Nipigon; at the southern end, it continues southward towards Toronto, while Highway 17 turns east toward the Ottawa Valley. An at-grade intersection with Highway 63 is located at approximately the midpoint of the concurrency.
  East of North Bay, Highway 17 meets Highway 94, thereafter travelling alongside the Mattawa River to its confluence with the Ottawa River in Mattawa, where it meets Highway 533 at a roundabout. The highway then parallels the Ottawa River through a mountainous region, first passing through the villages of Stonecliffe and Rolphton before arriving in Deep River, a planned community developed as part of the Manhattan Project. It then passes through Chalk River and enters Canadian Forces Base Petawawa.
  Beginning at the southern end of the army base, Highway 17 follows the Pembroke Bypass, bypassing west of Petawawa and Pembroke, where it intersects Highway 41. The bypass ends at Renfrew County Road 40, north of Muskrat Lake. The highway then travels south through the town of Cobden. It follows a bypass east of Renfrew and meets Highway 60. Highway 17 curves east and passes north of Alexander Stewart Provincial Park. Approximately 200 m (660 ft) west of Scheel Drive, 6 km (3.7 mi) west of Arnprior, the highway divides and widens to four lanes, at which point Highway 417 begins. A disconnected section of the highway (known as Old Highway 17) still exists within the Ottawa Region between Regional Road 29 and Grants Side Rd, travelling directly parallel to Highway 417. However, it is likely to be downgraded and possibly absorbed as part of Regional Road 117.
caption: One of the few short sections of 4-lane divided Highway 17 between Echo Bay and Desbarats
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