Following are all highways for which the province is responsible from 581 through 610.
For help with abbreviations used here, please see my list of abbreviations defined.
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 | Southern Terminus: | Hwy 11/TCH at Moonbeam |
| Northern Terminus: | Entrance to Rene Bruelle Provincial Park | |
| Length: | 11 km | |
| Notes: | The main purpose of SH-581 seems to be to provide access to Rene Bruelle Provincial Park from Hwy 11. | |
 | Western Terminus: | Hwy 11/Hwy 17/TCH approximately 3 km west of Hurkett |
| Northern Terminus: | Hwy 11/Hwy 17/TCH approximately 3km north of Hurkett | |
| Length: | 6 km (approximately) | |
| Notes: | SH-582 is a "loop-route" through the community of Hurkett, following an earlier alignment of Hwy 17. | |
  | Southern Terminus: | Mead Station on Algoma Central Railway, 37km south of Hearst |
| Northern Terminus: | South limit of the Town of Hearst, 4km south of Hwy 11/TCH | |
| Length: | 33 km (approximately) | |
| Notes: | The portion of SH-583 within the limits of the Town of Hearst were downloaded onto the local authorities in January 1998, thus creating a "disconnected" SH-583. This southern section is a "detached" highway, in the sense that it no longer connects with any portion of the provincial highway system. It is unclear whether the Town of Hearst has retained the SH-583 shields within their jurisdiction. | |
| Prior to downloading, the formerly complete routing of SH-583 was 50km in length. | ||
 | Southern Terminus: | North limit of the Town of Hearst, 6km north of Hwy 11/TCH |
| Northern Terminus: | Lac-Ste-Therese 12km north of Hearst | |
| Length: | 6 km (approximately) | |
| Notes: | The portion of SH-583 within the limits of the Town of Hearst were downloaded onto the local authorities in January 1998, thus creating a "disconnected" SH-583. This northern section is a "detached" highway, in the sense that it no longer connects with any portion of the provincial highway system. It is unclear whether the Town of Hearst has retained the SH-583 shields within their jurisdiction. | |
| Prior to downloading, the formerly complete routing of SH-583 was 50km in length. | ||
 | Southern Terminus: | North limit of the municipality of Greenstone, north of Geraldton |
| Northern Terminus: | Nakina | |
| Length: | 50 km (approximately) | |
| Notes: | All of SH-584 within the limits of the southern section of the municipality of Greenstone, which comprises the communities of Longlac, Geraldton, Jellicoe, Beardmore, Orient Bay and others, was turned back to local control in January of 1998. SH-584 formerly began at MacLeod Provincial Park south of Geraldton, ran north through that community on its way toward Nakina, which, ironically is contained within the municipality of Greenstone as a disconnected portion. SH-584 in this discontiguous portion of Greenstone (the Nakina area) was retained in the provincial highway system. | |
 | Southern Terminus: | Hwy 11/Hwy 17/TCH at Nipigon |
| Northern Terminus: | Community of Pine Portage on the Nipigon River | |
| Length: | 36 km | |
| Notes: | SH-585 parallels the Nipigon River from near Lake Superior at Nipigon to just shy of Lake Nipigon at Pine Portage. | |
 | SW Terminus: | North shore of Shebandowan Lake, southwest of Shebandowan |
| NE Terminus: | Hwy 11/TCH west of the community of Shebandowan | |
| Length: | 5 km | |
| Notes: | This highway is a rather short spur-route. | |
 | Southern Terminus: | Silver Islet at the southern tip of the Sibley Peninsula in the Sleeping Giant Provincial Park |
| Northern Terminus: | Hwy 11/Hwy 17/TCH north of the community of Pass Lake, 35km northeast of Thunder Bay | |
| Length: | 42 km | |
| Notes: | SH-587 serves as the access road to most of Sleeping Giant Provincial Park's recreational facilities. The road is hard-surfaced its entire length. | |
 | Western Terminus: | Terminus ___ km west of Suomi |
| Eastern Terminus: | Hwy 11/Hwy 17/TCH near Stanley | |
| Length: | 54 km | |
| Notes: | ||
 | Southern Terminus: | Hwy 102 in northern Thunder Bay, 7km northwest of jct Hwy 102 & Hwy 11/Hwy 17/TCH |
| Northern Terminus: | South shore of Dog Lake | |
| Length: | 31 km | |
| Notes: | ||
 | SW Terminus: | SH-588 just east of Nolalu |
| NE Terminus: | Hwy 11/Hwy 17/TCH in Kakabeka Falls | |
| Length: | 26 km | |
| Notes: | Approximately half of this highway runs due north-south, while the remaining portion runs almost due east-west, resulting in the modified termini for this listing. | |
 | Southern Terminus: | SH-589 in Lappe |
| Northern Terminus: | Cnr of Glenbride & Island Lake Rds, 8km northwest of Lappe | |
| Length: | 8 km | |
| Notes: | ||
 | Southern Terminus: | Hwy 11 at Novar, near the northern limit of the Town of Huntsville |
| Northern Terminus: | Hwy 11, 3.9km north of Emsdale | |
| Length: | 14.8 km | |
| Notes: | SH-592 runs along a former alignment of Hwy 11. | |
 | Southern Terminus: | Hwy 61, 3 km north of the Minnesota border |
| Northern Terminus: | SH-588, 8km west of Nolalu | |
| Length: | 52 km | |
| Notes: | SH-593 is the southernmost secondary highway in Thunder Bay District, and second only to Hwy 61 as the southernmost provincial highway in the district. | |
 | Western Terminus: | Hwy 17/TCH north of the community of Eagle River |
| Eastern Terminus: | Hwy 17/TCH in Dryden | |
| Length: | 40 km | |
| Notes: | SH-594 provides an alternate route to Hwy 17 west of Dryden, but is 11km longer than the main route. | |
 | Southern Terminus: | SH-597 22km southeast of South Gillies (via secondary highways) |
| Northern Terminus: | SH-590, 8km west of the community of Kakabeka Falls | |
| Length: | 41 km | |
| Notes: | ||
 | Southern Terminus: | Hwy 17 east of Keewatin, 3km west of the centre of Kenora |
| Northern Terminus: | Minaki | |
| Length: | 50 km | |
| Notes: | This highway provides an all-paved route from the Kenora area to Minaki, on the Canadian National Railway line. | |
 | Southern Terminus: | Cloud Lake area at the intersection of ______ & _______ Rds |
| Northern Terminus: | SH-608, 11km east of South Gillies | |
| Length: | 17 km | |
| Notes: | ||
 | Southern Terminus: | Hwy 17/TCH just east of Ignace |
| Northern Terminus: | Community of Central Patricia | |
| Length: | 292 km | |
| Notes: | SH-599 is the longest Secondary Highway in Ontario, beating out the second-longest, SH-527, by 50km. This route is also the sixth longest provincial highway in the entire system, being beat out by such notibles as Hwy 401, Hwy 17, and Hwy 11! | |
| This highway began, oddly enough, as a route connecting the community of Savant Lake on the Canadian National Railway with the community of Central Patricia, making it notible that it was a 170km highway that only connected with a railway station! After many years, SH-599 eas pushed southward to connect up with Hwy 17/TCH, therefore connecting it with the rest of the provincial highway system. Later, connections with SH-516 and SH-642 were also completed. | ||
| Beginning in 1966, TH-808 continued north from SH-599's northern terminus at Central Patricia, extending northerly for 59 km through the the most remote portions of Northern Ontario, before terminating in the wilderness. TH-808 was, however, removed as a tertiary highway in c.1984 and the route is no longer provincially-maintained. | ||
 | Western Terminus: | Hwy 11 in Rainy River |
| Eastern Terminus: | Jct Hwy 71/TCH & SH-615 east of Black Hawk | |
| Length: | 89 km | |
| Notes: | While classified here as an "east-west" highway, SH-600 actually runs north-south for its first 25km, before turning east-west for approximately 30km, then stair-steps in a generally southeastern direction for 30km to its eastern terminus. | |
 | Western Terminus: | Hwy 17/TCH at Dryden |
| Eastern Terminus: | Hwy 17/TCH, 5km east of Dryden | |
| Length: | 25 km | |
| Notes: | SH-601 is truly a "loop" route: While the highway is 25km in length, its termini lie on the same highway only five kilometres apart! | |
| One of this highway's primary purposes seems to be to provide access to Dryden's airport. | ||
 | Western Terminus: | Hwy 11/TCH at Emo |
| Eastern Terminus: | Hwy 11/TCH, 12 km west of Fort Frances | |
| Length: | 48 km | |
| Notes: | SH-602 does not deviate from the course of the Rainy River along its entire 48km length, staying within a kilometre or two of the river at all times. In that sense, SH-602 provides a 13km-longer alternate route to Hwy 11 between Emo and Fort Frances. | |
 | Southern Terminus: | Hwy 17/TCH at Borups Corners |
| Northern Terminus: | Dyment | |
| Length: | 5 km | |
| Notes: | Sh-603 is a short spur-route serving the community of Dyment from Hwy 17 at Broups Corners. | |
 | Southern Terminus: | Hwy 17/TCH at Oxdrift |
| Northern Terminus: | Terminus, __ km north of Eton-Rugby | |
| Length: | 12 km | |
| Notes: | SH-605 is a spur-route, serving the community of Eton-Rugby and nearby areas, terminating only 12km north of Hwy 17. | |
 | Southern Terminus: | Hwy 69/TCH at Bigwood |
| Northern Terminus: | Hwy 64 east of Alban in the Municipality of French River | |
| Length: | 12 km | |
| Notes: | This highway serves as a cut-off route between Hwy 69 at Bigwood and Hwy 64 east of Alban, shaving 5km off the trip as compared with using Hwy 69 and Hwy 64 only. | |
| Tourist Route: | Lake Nipissing Circle Tour: Entire length. While not explicitly stated, it is very likely SH-607 is included in the Lake Nipissing Circle Tour. | |
 | Southern Terminus: | The community of French River (not located in the Municipality of French River, nearby) |
| Northern Terminus: | SH-607 just east of Bigwood | |
| Length: | 2.6 km | |
| Notes: | SH-607A is a short spur route leading from SH-607 into the small community of French River, which is not to be confused with the nearby Municipality of French River. | |
 | Western Terminus: | SH-595 in South Gillies |
| Eastern Terminus: | Hwy 61, 5km south of the jct of Hwy 61 & Hwy 130, approximately 25km southwest of Thunder Bay | |
| Length: | 19 km | |
| Notes: | ||
 | Southern Terminus: | Hwy 105 at the community of Red Lake Road |
| Northern Terminus: | South shore of Clay Lake | |
| Length: | 15 km | |
| Notes: | Most of SH-609 is gravel-surfaced. Only the portion south of the Canadian National Railway line is hard-surfaced. | |
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Continue to Highways 611-635 |
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