When volcanoes last erupted in Lake County, people had just migrated to this region. That was 11,000 years ago. Still, in geological time, that is recent. The area around Mount Konocti bears evidence of this volcanic activity, including its famous red soil and ubiquitous obsidian rock. Today, those rocks gleam in the sun, their shiny silica surfaces reflecting their origin – and lend their name to the business Peter Molnar helped build alongside partner Michael Terrien, brother Arpad, and their family: Obsidian Ridge Vineyards.