Oppstrynsvatnet is a lake in Stryn, in Sogn og Fjordane county.
The lake stretches from Hjelle in Oppstryn to Mindresunde, where the river "Stryneelva" starts and finally ends in the Nordfjord in Stryn. The rivers "Hjelldøla", "Erdalselva" and "glomsdøla" fill the Oppstrynsvatnet with green glacier water. It is clay from the glacier that colors the lake gray-green.
At the deepest, at Nesje, Oppstrynsvatnet is 230 meters, and is among the 20 deepest lakes in the country.
There's plenty of Arctic char and trout. During the summer season you can also catch trout, salmon and eel as they enter the lake from the fjord. Using a rod you may fish with lures, flies og worms. You may also use a planer board. The use of net is only allowed with explicit permission from an owner.
You are not allowed to fish in the lake or the surrounding rivers without a valid fishing licence. You can purchase daily, weekly or season licences at the following locations: Holmevik Camping, Strynsvatn Camping, Mindresunde Camping and Lidasanden. Children up to and including 16 years of age do not require a licence.