St. Olavsleden (English: St. Olav's Path; Swedish: S:t Olavsleden), is a pilgrim's way between Selånger outside Sundsvall in Sweden and Nidaros Cathedral in Trondheim in Norway, commemorating Saint Olaf who was King of Norway from 1015 to 1028. St. Olavsleden was one of the Pilgrim's Routes. From the 1970s until 2012, it was called the Mittnordenleden.

Today St. Olavsleden stretches 564 kilometres (350 mi) from the Bothnian sea in the east to the Atlantic Ocean in the west through two countries and eleven municipalities.

The trail is marked with the St. Olav symbol, which marks all the so-called St. Olav roads (Swedish: S:t Olavsvägar), leading towards Nidaros Cathedral. St. Olavsleden passes through the ancient cultural landscape, following as closely as possible the roads and paths that pilgrims of that time and other travelers wandered and rode. The first hundred kilometers the trail mostly follows Ljungan river, and in Jämtland the trail goes along the lakes Revsundssjön and Storsjön, and eventually Indalsälven river. St. Olavsleden crosses the Scandinavian mountains on the border between Sweden and Norway along Swedish county road 322 (Skalstuguvägen) and in Norway goes through the agricultural landscape near the Trondheim fjord. St. Olavsleden is moderately hilly which makes it suitable for cycling.