Starting point: Toce waterfall, parking next to the old hotel – 1685 m (5528 ft). You can also get there using the Domodossola-Formazza bus route.
Route: Toce Waterfall – Riale – Maria Luisa refuge – Toggia Dam – San Giacomo Pass (maximum height at San Giacomo Pass, 2313 m – 7589 ft)
Ascent: 628 m (2060 ft)
Length: 11.8 km (7 1/3 miles) in one direction. The route can be shortened by starting straight from Riale
Terrain: Dirt track
Best time of year: From June to October
Points of interest: Nature (flora, fauna, views) – Toce waterfall – High altitude alpine meadows – Lago Toggia
Useful info: The road from the San Giacomo Pass, with its reduced gradient, was built in the 1920s to serve the Toggia and Kastel dams. From the Toggia dam, an alternative route on a dirt track takes you to Lake Kastel.
You can stay or eat near the Toce waterfall, in the stunning Walser Germanic village of Riale, or in the Maria Luisa refuge.