Saskatchewan Highway 35

Highway 35 is a paved, undivided provincial highway in the Canadian province of Saskatchewan. It runs from the U.S. border at the Port of Oungre (where it meets U.S. Route 85) north to a dead end near the north shore of Tobin Lake. The southern end of Highway 35 is one segment of the CanAm Highway, which is an international highway connecting Canada, the United States, and Mexico. Highway 35 is about 569 kilometres (354 mi) long.

Highway 35 connects with the following major Saskatchewan highways: 18, 39, 33, 48, 1, 22, 15, 16, 5, 3, and 55. Major communities along the highway include Weyburn, Qu'Appelle, Fort Qu'Appelle, Wadena, Tisdale, and Nipawin. Parks accessed from the highway include Oungre Memorial Regional Park, Mission Ridge Winter Park, Nipawin & District Regional Park, and Tobin Lake Recreation Site (Caroll's Cove Campground).

Mudslides and spring flooding were huge road-building and maintenance problems on various stretches of Highway 35, including along the southern portion through the Greater Yellow Grass Marsh and along the Souris River, in the middle section through the Qu'Appelle Valley, and in the northern section by Nipawin and at the Saskatchewan River. Several dams and water control measures were built over the years to control flooding.

The 2018 Humboldt Broncos bus crash occurred on Highway 35 at the intersection with Highway 335 about 28 kilometres (17 mi) north of Tisdale.

Highway 35 traverses three distinct topographical areas from its southern end to its northern terminus. The rolling moraines and valleys of the mixed grassland at its southern end give way to aspen parkland towards the middle section. The northern portion of the route is within the southern boreal forest which consists of agricultural land mixed with heavily forested areas. Beginning at the border with the US, the highway heads north crossing other major highways, such as the Trans-Canada and the Yellowhead, major rivers, such as the Qu'Appelle and the Saskatchewan, and ends at Tobin Lake in east-central Saskatchewan.

Highway 35 begins at the Port of Oungre border crossing. Going north from the border, it meets Highway 18 at Oungre, provides access to Oungre Regional Park, and crosses Long Creek. From Long Creek, the highway passes through Tribune and carries on to Weyburn where it crosses the Souris River and meets Highways 13 and 39. Weyburn is the only city on Highway 35 and has been dubbed the Soo Line City due its connection with Chicago on the Soo Line of the Canadian Pacific Railway (CPR). Weyburn is located astride the Williston geological Basin which contains oil deposits, and several wells operate in the vicinity. Notable points of interest in Weyburn accessible from Highway 39 include the Soo Line Historical Museum, Tommy Douglas statue, Weyburn Heritage Village, and the Water Tower. Off Highway 35, at the north end of Weyburn, is access to the site of the former Souris Valley Mental Health Hospital, which at the time of its construction in the 1920s, was the largest building in the British Commonwealth. From Weyburn, the highway continues north past Cedoux and on to Highway 33 and Francis. After Francis, it continues north crossing Highway 48 before meeting Highway 1.

The southern portion of Highway 35 from the Port of Oungre at the Canada–United States border to the city of Weyburn forms the initial segment of the CanAm Highway in Saskatchewan. This segment is 74.6 kilometres (46.4 mi) long. Other highways in Saskatchewan that are part of the CanAm Highway network include 39, 6, 3, and 2. The CanAm Highway was a concept that begun in the 1920s and is an important route for the North American Free Trade Agreement (NAFTA) super corridor connecting Mexico, the United States, and Canada.

Highway 35 has a short 700-metre (2,300 ft) westward concurrency with Highway 1 before turning north. About 2 kilometres (1.2 mi) from Highway 1, Highway 35 enters the town of Qu'Appelle where it follows N Pacific Avenue west then Qu'Appelle St north through town. Qu'Appelle had historic beginnings with fur trading posts in the area and was the former terminus of the CPR. From Qu'Appelle, Highway 35 heads north where it meets, and has a concurrency with, Highway 10 en route to Fort Qu'Appelle in the Qu'Appelle Valley. At Fort Qu'Appelle, Highway 35 is met by other highways including 22, 56, and 210. Fort Qu'Appelle is situated on the Qu'Appelle River between Echo and Mission Lakes of the Fishing Lakes. The town has a vibrant history being an early fur trading post. The 1897 Hudson's Bay Company store, 1911 Grand Trunk Pacific Railway station, Fort Qu'Appelle Sanatorium (Fort San), and the Treaty 4 Governance Centre are all landmarks of Fort Qu'Appelle. In Fort Qu'Appelle, Highway 35's concurrency with 10 ends as Highway 10 continues on eastward. It then begins a 16-kilometre (9.9 mi) concurrency with Highway 22 as it climbs out of the valley and heads north towards Lipton. At this point, Highway 22 branches off west while Highway 35 carries on north through the Touchwood Hills en route to Highway 15 and Leross. It crosses Highway 15 and traverses the western part of the Beaver Hills as it makes its way to the Yellowhead Highway and Elfros.