On March 19, 2021, the volcano erupted after lying dormant for 800 years. 6 months later, the volcano on Iceland’s Reykjanes peninsula is still spewing lava and expanding its flow field. The lava flow has since cut off access to this most popular hiking trail to the eruption site.Geldingadalsgos Volcano Site Hike Reykjanes Peninsula.On March 19, 2021, the volcano erupted after lying dormant for 800 years. 5 months later, the volcano on Iceland’s Reykjanes peninsula is still spewing lava and expanding its flow field. The lava flow has since cut off access to this most popular hiking trail to the eruption site