Set near Lake Mývatn, at the divergent boundaries of the North American and Eurasian tectonic plates, the Iceland Volcano Marathon route will be run directly in the North Volcanic Zone. It’s a hot bed of geothermal activity with geysers, hot springs, and lava rock – what’s more, the volcanic zone is still very much active.

With the massive Hverfjall crater as the focus of the route, runners will pass through soft, black volcanic sand as they run the rim of the crater, as well as pass through the ethereal lava fields known as Dimmuborgir, or "Dark Fortress," and under a wild natural arch. The route traverses single-track trail, plains of lava lock, and several minor volcano craters.  

Runners can choose between marathon, half marathon or quarter marathon.

More info: https://www.iceland-volcano-marathon.com