Where to park: try to drive up to the volcano, there is a small road that can be driven with a 4×4 wheel drive. Drive from the F225 on the Hekla streets towards the volcano. (http://www.openstreetmap.org/node/613767494)
What to do: hike up to the volcano, which will take around 7 hours – up and down. We did not have the time to do that, we only hiked for 2 hours.
Tips: in case you can not drive up to the volcano because the road is blocked by a snow field. There is a small parking space nearby.