Route 91
Old Placentia Highway
Route information
Maintained by Newfoundland and Labrador Department of Transportation and Infrastructure
Length	48 km (30 mi)
Major junctions
East end	Route 90 at St. Catherine's
Major intersections	Route 93 in Colinet Route 81 in Colinet Route 92 near Colinet
West end	Route 100 at Southeast Placentia
Location
Country	Canada
Province	Newfoundland and Labrador
Highway system
Highways in Newfoundland and Labrador
← Route 90 → Route 92

Route 91, also known as Old Placentia Highway, is a 48-kilometre-long (30 mi) east–west highway located on the Avalon Peninsula in the Canadian province of Newfoundland and Labrador. The highway starts at a junction at Route 90,^[1] traveling through the town of Colinet on a paved road, then transitions to a dirt road just west of the Route 92 junction,^[2] only to transition back to a paved road prior to approaching its western terminus, Southeast Placentia,^[3] where it intersects with Route 100. Along the stretch of dirt road is Cataracts Provincial Park, one of only a small number of active provincial parks remaining since 1997.

Location	km	mi	Destinations	Notes
Southeast Placentia	0.0	0.0	Route 100 (The Cape Shore Highway) – Placentia, Argentia, St. Bride's, Branch	Western terminus; provides access to the Marine Atlantic Nova Scotia Ferry at Argentia
Cataracts Provincial Park	31.2	19.4	Route 92 south (North Harbour-Branch Highway) – Branch, North Harbour	Northern terminus of Route 92
Colinet	34.6	21.5	Route 81 north (Markland Road) – Markland, Whitbourne	Southern terminus of Route 81
	34.9	21.7	Route 93 east (Mount Carmel Road) – Harricott, Mount Carmel	Western terminus of Route 93
St. Catherine's	48	30	Route 90 (Salmonier Line/Irish Loop Drive) – Holyrood, St. Mary's, St. Vincent's	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi