Tröllafossar is a waterfall in the West of Iceland along road 50, near the bridge over the river Grimsá. Tröllafossar is one of the many waterfalls in the river Grimsá, and is one of the largest. Tröllafossar means waterfall of the trolls and isn’t very high but yet very wide, 70-80 meters.
Near the waterfall is a popular campsite for Iceland people, including a kind of troll exhibition in the open air. From the waterfall there is a beautiful view of the Skessuhorn, a distinctive pyramid-shaped mountain in the Skarðsheiði massif.
Grimsá is a river which rises from the Reyðarvatn and through the Lundarreykjadalur eventually flows into Borgarfjördur. The river can be good fishing for salmon.
Other waterfalls in the river Grímsá: Laxafoss, Laekjarfoss, Jotnabruarfoss, Kleppagilsfoss, Kleppafoss I-II-III, Selsmyrarfoss, Kerlingafoss, Kalfgilsfoss/Englandsfoss, Breiðifoss, Lambárfoss and Sellfoss. Probably these are small waterfalls.