Stråken, Glacial lake in Jönköpings län, Sweden.

Stråken is a lake in Västergötland and Småland, stretching about 24 km from Broholm in the north to Bottnaryd in the south at 208 m above sea level. It is a fissure lake, very narrow and crossed by several bridges including the one carrying the Jönköpingsbanan railway, with a maximum depth of 38 m and many shallow sand banks.

At Kyrkekvarn, where the Tidan leaves the lake, a mill stood at least since the 16th century; in 1888 it was replaced by the Tidafors sulphite factory, and when that closed in 1918 a hydroelectric plant was built there. Timber was floated on the lake: pulpwood was towed by the boat Tidan to the factory, and from about 1920 to the 1930s sawn goods from Bottnaryd's steam saw at Vaboholm went by barge to a reloading point at the Stråken bridge near Mullsjö. Between 1911 and 1920 a passenger boat also ran on the lake.

The lake's name recurs in local transport history: a passenger boat called Stråken ran on the water from 1911 to 1920, and the sawmill Stråkens Såg & Lådfabrik kept a steamboat that carried passengers in some years. Timber was towed across the lake by the boats Tidan and Elin, and sawn goods from Bottnaryd were shipped by barge to the railway crossing at Mullsjö.

Stråken is about 24 km long, from Broholm in the north to Bottnaryd in the south, and very narrow, crossed by several bridges including the Jönköpingsbanan railway. A general speed limit of 5 knots applies; areas without it are meant for water skiing. Public bathing spots and boat slipways lie along the shore, mostly in the northern part, and a fishing licence is required.

The lake is home to several fish species that inhabit different depth zones and occupy specific ecological niches. Some of these species follow seasonal patterns of movement that relate to water conditions and breeding cycles.