Started at Devils Lake TH and headed towards wickiup plains then cross country along the edge of a massive lava flow towards the closest point into the summit at Rock Mesa. Ended up finding an unmarked, unmapped trail up into the lava that has been abandoned for unknown reasons. Used that trail to get up onto the lava flow and then just went straight for the summit. Lots of up and downs over the flows, but the summit was cool and the environment interesting.