This lovely little hike goes through the hot spring river valley of Reykjadalur. The start of the track can be found by driving 40 minutes east of Reykjavík near the small town of Hveragerði, which is easily accessible by the city’s bus system.
The trailhead starts at the end of town, past the golf course and horse stables. The hike isn’t technical, though it is steep in parts, and the round-trip is roughly 7 kilometers. Bring your bathing suit and towel because at the end of the trail there is a geothermal river where you can bathe in warm water while admiring the astonishing Icelandic landscape.