Þríhyrningur

Þríhyrningur rises above the farming country north of Fljótshlíð, away from the densest line of South Coast buses and waterfall pull-offs. Its name points to the mountain's three peaks, and its value is the broad view over a landscape tied to Njál's Saga as much as to scenery.

A local Iceland travel editor would add Þríhyrningur for active travelers who have already made space around South Iceland and want one less obvious viewpoint. The same editor would skip it for low cloud, strong wind, short daylight, a rushed South Coast Road Trip, or a group that only wants easy roadside stops.

If your day already includes Seljalandsfoss, Gljúfrabúi, or Nauthúsagil, Þríhyrningur can turn the area into a more rounded Fljótshlíð day. If you are racing east toward Skógafoss or Vík, the mountain is usually the first thing to cut.

Official geosite information names Flosadalur between the peaks and the gorges Katrínargil and Tómagil in the mountain. Those details matter because Þríhyrningur is not only a shape on the skyline; it is a viewpoint with its own valleys, cliffs, and saga associations.

In clear weather, the view can pull together Hekla, Eyjafjallajökull, Tindfjallajökull, Tindfjöll, the Fljótshlíð countryside, and the South Iceland lowlands. In poor visibility, the same hike can feel like work without the main payoff.

That is the main tradeoff. Þríhyrningur is memorable when the sky opens and the route is not rushed; it is easy to regret when it steals time from stronger weather-proof stops.

The approach is commonly described from road 261 toward Tumastaðir, through Vatnsdalur, and toward the Fiská area before the ascent. Treat that as route orientation, not a substitute for official visitor details, local signs, road conditions, and weather checks.

The hike suits travelers who already like uneven ground and exposed viewpoints. It is weaker for families or groups expecting a short stroll, especially when wind, snow, wet ground, or short daylight changes the feel of the day.

For an active and quieter day, pair Þríhyrningur with Fljótshlíð and Nauthúsagil. That combination keeps the focus on valley texture, mountain views, and less crowded South Iceland scenery.

For a first-trip day, use Seljalandsfoss and Gljúfrabúi as the easier anchors, then add Þríhyrningur only if weather and daylight leave room. This keeps the famous waterfall stop protected while making the mountain optional.

If you are continuing toward Skógafoss, be stricter. Þríhyrningur can make the day richer, but it can also push the South Coast sequence past the point where each stop gets enough attention.

The most important check is not whether Þríhyrningur sounds beautiful. It is whether the mountain still makes sense after wind, visibility, road surfaces, daylight, and group ability are considered together.

If snow or poor visibility affects the approach, move the stop to a flexible slot or choose an easier nearby waterfall or valley stop. Winter Driving in Iceland is the better planning companion when roads and daylight are part of the decision.